55results about How to "Eliminate risk" patented technology

This invention discloses a comprehensive management method and system for base station power consumption, belonging to the field of base station power consumption. The method includes: topological mapping of the access relationships of AC / DC equipment within the base station to form a hierarchical power consumption association list; dynamic clustering parsing of the list to generate a time-series evolution chain reflecting state changes and remote control history; constructing a device differentiation identification model based on the time-series evolution chain, determining abnormal metering factors and outputting candidate correction events; labeling the corresponding areas of the candidate events as local anomalies, and generating a correction reference group by fusing multi-source information such as meter readings and sensor data; dynamically iteratively correcting the global metering results based on the correction reference group, and generating intelligent management instructions by combining the corrected load sharing ratio and branch authorization strategy. The system includes corresponding functional modules. This invention can systematically solve the problems of unclear base station power consumption topology, inaccurate metering, and extensive management, achieving high-precision metering and automated intelligent control.

This application discloses a dynamic form construction method, device, and medium, relating to the fields of software engineering and enterprise application development technology. The method includes: receiving a form request containing a view model identifier and request type based on a preset view parsing and execution engine; parsing a predefined view model according to the identifier to obtain its metadata, which defines the target business entity, view data object structure, field set, and filtering conditions; for data query requests, dynamically constructing and executing SQL statements based on the aforementioned metadata, obtaining raw data, performing aggregation and transformation, and generating structured view data that meets the front-end rendering requirements for return; for data submission requests, converting the data submitted from the front-end back into domain model data according to the same view model, and calling the business entity engine service to complete business logic verification and persistent storage, thereby achieving dynamic generation of the form view, decoupling of front-end and back-end logic, and ensuring business consistency.

A proxy value allocation and instant settlement system for atomic tasks is disclosed. The task decomposition module is configured to receive complex tasks and decompose them into multiple atomic subtasks using a directed acyclic graph (DAG) algorithm. Each atomic subtask is bound to a dynamic identity identifier of the executor proxy. A value weight allocation module, connected to the task decomposition module, is configured to calculate the value weight and corresponding settlement amount for each atomic subtask based on preset indicators. A fund locking module, connected to the value weight allocation module, is configured to pre-lock the total task funds at a distributed settlement node using a smart contract and set release conditions. This invention, by utilizing the DAG construction unit within the task decomposition module during the task initiation phase, can decompose complex macro-objectives into a set of atomic subtasks with independent executability and verifiability, eliminating the risks of identity theft and responsibility shirking during task execution and laying the foundation for subsequent settlement.

A drop hammer impact testing device for anchor bolts or anchor cables includes a lifting mechanism, a main frame, a hammer-grabbing device, a guide structure, a connecting structure, an impact force transmission mechanism, a hammer body, and a lifting rod. The main frame has a top plate at its top and a bottom plate at its bottom. The guide structure is located within the main frame, and the lifting mechanism is located on the upper surface of the top plate. The output end of the lifting mechanism is connected to the hammer-grabbing device, and the hammer body is located at the bottom of the hammer-grabbing device. Both the hammer-grabbing device and the hammer body are slidably fitted with the guide structure. This drop hammer impact testing device for anchor bolts or anchor cables solves the problem that the testing of anchor bolt or anchor cable support materials in related technologies focuses on static load testing, resulting in a lack of means to test the quality of anchor bolt or anchor cable support materials under impact loads.

This invention discloses an intelligent management and control method and system for communication tower maintenance, belonging to the field of communication facility maintenance and management technology. It constructs a comprehensive digital archive; achieves closed-loop management of vehicle operation trajectories and fuel consumption, calculating theoretical fuel consumption through a dynamic fuel consumption model and fitting it with actual fuel consumption for analysis; implements collaborative management of personnel work trajectories and work quality, triggering standardized work processes through geofencing, and using convolutional neural networks to identify compliance in process images; establishes material and work order associations through RFID tags, compares actual consumption with standard usage deviations, constructs a cost prediction model using a long short-term memory network, and outputs visual reports. This invention, by constructing a multi-dimensional closed-loop management and control logic, realizes the transformation of operation and maintenance resources from post-event statistics to real-time verifiable data, significantly improving cost control accuracy, work quality, and resource utilization efficiency.

This utility model proposes a maintenance-free vacuum machine, comprising: a spiral central shaft and a cylinder. The central surface of the spiral central shaft has a spiral structure. The cylinder is installed in conjunction with the spiral central shaft, and the contact surfaces of the two are fitted together to ensure that no lubricating oil enters the cylinder, avoiding problems such as oil carbonization, emulsification, and contamination. There is no need to replace the filter element, add lubricating oil, or stop the machine for maintenance regularly, which greatly reduces the operation and maintenance costs. The outer periphery of the cylinder is provided with a first water-cooling jacket, which is connected to an external cooling device through cooling pipes. It is used to cool the cylinder with circulating water, keeping the operating temperature at 30-40℃, effectively slowing down component aging, extending equipment life, and eliminating the risks of high-temperature burns, lubricating oil leakage, and mechanical jamming, reducing safety hazards for operators. Exhaust gas is discharged directly without oil mist pollution. The water cooling system reduces water waste through closed-loop circulation, which meets the requirements of green manufacturing.

This invention relates to the field of caisson bottom sealing construction technology, and discloses a dynamic sealing sludge and water inrush sealing system for caissons. The system integrates a bottom sealing template assembly, a dynamic sealing baffle, a novel quick-setting sealing grout injection assembly, a drainage and pressure relief assembly, a fixing and anchoring assembly, and an anti-sludge isolation assembly. The bottom sealing operation is completed through an integrated process of layered sealing, immediate curing, and simultaneous bottom sealing. During construction, the base is first cleaned and the components are installed; after the dynamic sealing baffle is deployed, it is hydraulically attached to the base plate and the water inrush point is detected; then, quick-setting grout is injected into the leakage area in a targeted manner, and drainage and pressure relief are simultaneously activated to regulate the pressure; after the grout has quickly set, the baffle is retained as a permanent water-stopping structure; finally, underwater concrete is continuously injected through a pre-set pipeline, and an anti-sludge isolation layer is set to ensure the density of the concrete. This system simultaneously achieves rapid water inrush sealing, dynamic pressure balance, and high-quality bottom sealing, solving the problems of poor sealing time, poor process connection, and difficulty in controlling the quality of underwater concrete in traditional processes.

The application discloses a multi-scene intelligent agent calling data processing method and system based on knowledge isomerization and belongs to the field of electric digital data processing. The method comprises the following steps: constructing an intelligent agent five-tuple description model and vectorization, realizing the capability standardization representation; accessing isomerized data through a multi-protocol gateway and pre-processing; carrying out demand deep identification based on a knowledge graph, mapping the pre-processed data to knowledge graph nodes, executing k-hop neighborhood search to extract an intention subgraph, and generating a demand feature vector through graph convolution neural network processing; a scheduling engine matches and calculates the demand feature vector and the intelligent agent capability feature vector, constructs a directed acyclic graph calling link according to the knowledge graph for a complex task; and the isomerized output is fused and the format is restructured by using evidence theory. The application realizes a complete closed loop from isomerized data input to multi-intelligent agent collaborative scheduling, and significantly improves the demand recognition accuracy and calling flexibility in multiple scenes.

The application provides a high-temperature protection device, a mounting device and a mounting method, wherein the high-temperature protection device comprises a connecting pipe and a detection rod, the detection rod is movably arranged in the connecting pipe, a long hole is arranged on the connecting pipe and extends along the axial direction of the connecting pipe, one end of the connecting pipe is provided with a first bolt assembly connected with one end of a fuse link, one end of the detection rod is provided with a second bolt assembly connected with the other end of the fuse link at the position corresponding to the long hole, a compression spring is further arranged between the first bolt assembly and the second bolt assembly, the other end of the connecting pipe is provided with an opening and is connected with a device main body, the other end of the detection rod can extend out of the connecting pipe and trigger a protection mechanism switch of the device main body, and the central axis of the connecting pipe, the central axis of the detection rod and the center line of the fuse link along the length direction of the fuse link coincide. The high-temperature protection device can prevent the occurrence of unexpected fracture, thereby effectively improving the safety and reliability of the entire fire extinguishing system.

This invention relates to the field of welding technology, and provides a through-type friction stir welding apparatus and method suitable for different plate thicknesses. The through-type friction stir welding apparatus includes a long needle stirring tool, a backing block, a limiting platform, a clamp, a positioning platform, and a worktable. The long needle stirring tool is mounted on a friction stir welding machine. The backing block is disposed on a limiting groove on the limiting platform. The positioning platform is disposed on both sides of the limiting platform, and the clamp is disposed on the positioning platform. This invention utilizes a through-type friction stir welding technology with a long needle stirring tool and a backing block, which can completely eliminate the potential risks of incomplete penetration and weak bonding at the weld root. By using a backing block made of the same material as the workpiece being welded, no material loss occurs during the through-type welding process, thus eliminating defects at the start of the through-type friction stir weld.

This invention belongs to the field of thermoplastic composite material joining technology, and specifically relates to a method for preparing a silane-modified thermoplastic composite resistance welding heating element. The invention first performs a cleaning pretreatment on a carbon nanotube film to remove surface contaminants. Then, plasma treatment technology is used to etch and activate the film surface, introducing oxygen-containing groups to provide active sites for silane grafting. Finally, silane is grafted onto the plasma-activated film using a silane coupling agent, utilizing its bifunctional properties to construct a molecular bridge between the carbon nanotubes and the resin, thereby improving the interfacial bonding force between the film heating element and the resin, and increasing the resistance welding strength. The heating element prepared by this invention has high specific strength, corrosion resistance, and better homogeneity with the base material, making it more suitable for complex welding joint service environments.

This invention discloses an intelligent water tank replenishment method based on dual-dimensional liquid level prediction hysteresis control, belonging to the field of intelligent water tank replenishment technology. The method specifically includes the following steps: loading water tank operating parameters; selecting a flow determination mode to determine the optimal inlet flow rate; performing a 24-hour water tank operation simulation, and switching between water tank inlet and shut-off states based on dual-dimensional liquid level hysteresis control ("1-hour predicted liquid level + 2-hour predicted liquid level"); after the simulation is completed, summarizing the water volume indicators over 24 hours to form a standardized statistical data set; and generating structured data reports and visualization charts. This invention, through dual-dimensional liquid level hysteresis control ("1-hour predicted liquid level + 2-hour predicted liquid level"), can identify the risk of overflow or drying up in advance, effectively reducing the amplitude of liquid level fluctuations; simultaneously, it can avoid mechanical wear caused by frequent equipment start-ups and shutdowns, extending the equipment's service life.

The utility model belongs to door lock technical field, specifically is a kind of door lock's latch mechanism, including integrally injection moulded latch body and connecting rod, connecting rod is equipped with limit block, baffle and spring through convenient dismounting mechanism assembly, latch body is equipped with metal sheath, convenient dismounting mechanism is matched through the limit protrusion in the assembly ring inside and the assembly slot on connecting rod, assembly slot includes rotating part, into end and limit part, the quick loading and unloading of baffle are realized, metal sheath is fixed through the double positioning structure of positioning column and positioning hole, positioning protrusion and positioning groove, the utility model reduces the quantity of parts and cost, eliminates the connecting stress concentration of split type latch, improves anti-fatigue performance, without tooling can quick dismounting, improve production maintenance efficiency, metal sheath effectively protects latch, prolongs service life, and it has low cost, high reliability and convenient maintenance.

The utility model provides a kind of flameless infrared radiation combustion stove, and the combustion stove includes furnace body, grate tray and heat accumulator, furnace body is equipped with annular furnace cavity, built-in spiral flow guide passage, bottom is equipped with tangential air inlet, so that combustible gas rotates flow along spiral trajectory, realizes pressure balance by centrifugal force;Grate tray is located in the upper portion of furnace cavity, is equipped with grate hole, inserts straight cylinder shape gas outlet pipe, gas outlet pipe is placed combustion nozzle;Heat accumulator is placed above grate tray, is equipped with heat storage hole corresponding with grate hole, gas outlet pipe and combustion nozzle are inserted therein, and heat accumulator absorbs combustion heat energy and converts into infrared and radiates.The stove realizes pressure balance by the rotating flow of combustible gas in spiral flow guide passage, forms flameless combustion on the upper portion of combustion nozzle after entering gas outlet pipe through grate hole.The heat accumulator converts combustion heat energy into infrared radiation, and simultaneously combines heat conduction and heat convection, efficiently transfers heat energy to the object to be heated.

This disclosure relates to the technical field of pipeline welding protection. One embodiment of this disclosure provides a pipeline welding protection device, which includes: a main pipe and a pair of outer shells. The outer shells are fixed to both ends of the main pipe surface. An expansion sealing assembly is disposed on the main pipe and the outer shells. A fixing plate is fixed to the outside of the main pipe. An inert gas filling assembly is disposed on the fixing plate. The expansion sealing assembly includes an air inlet located at one end of the main pipe. Airbags are connected to the outside of the outer shells. Several air inlets are provided on both sides of the outer shells. Inner strips are provided on both sides of the inner shells, and several tension springs are connected between the inner strips. Through the above technical solution, the technical problem of poor sealing effect and easy leakage of inert gas is solved by the prior art method of sealing the inside of the pipeline at both sides of the weld with sealing materials such as cardboard and then filling it with inert gas.

This invention relates to the field of chemical reaction equipment technology, specifically to a formaldehyde oxidation reactor with an easy-to-clean airflow distribution plate. The reactor includes a reactor body, an inlet chamber, an airflow distribution plate, and a cleaning system. The cleaning system includes a gas collecting hood disposed within the inlet chamber, a gas delivery mechanism that drives the gas collecting hood to rotate around the axis of the reactor body while adhering to the bottom surface of the airflow distribution plate, and a high-pressure pulse source located outside the reactor body. By setting a sliding gas collecting hood within the inlet chamber and cooperating with the external high-pressure pulse source, online cleaning is achieved without shutting down the reactor or lowering the temperature. This transforms traditional top mechanical scraping into a bottom-directed jet, eliminating the interference and jamming risks caused by mechanical scrapers moving between high-temperature, dense air caps, and solving the problems of flow deviation and localized overheating caused by pore blockage.

The utility model discloses an obstetrical waste liquid collecting device, including collecting subassembly, connecting conduit and storage subassembly, collecting subassembly and storage subassembly through connecting conduit sealed connection, collecting subassembly includes collecting outer cover, the bottom of collecting outer cover is sealed and inserted with the drainage joint of connecting conduit inserted, and the drainage joint is connected with the drainage joint of collecting outer cover. A collecting inner cover is placed at the top of the collecting outer cover and located in the center of the collecting outer cover, an isolation cavity is formed between the collecting outer cover and the collecting inner cover, a plurality of protruding blocks are integrally formed on the inner wall of the collecting outer cover, clamping grooves are formed in the top of the collecting outer cover, and the clamping grooves and the protruding blocks are connected in an embedded mode. According to the utility model, not only can some impurities be filtered, but also liquid can quickly flow into the isolation cavity to avoid splashing; meanwhile, the liquid can be guided into the negative pressure drainage bottle through the connecting guide pipe, continuous negative pressure drainage of the liquid is achieved through the spring and the one-way valve, and therefore the risks of liquid gathering and splashing are more effectively eliminated.

This invention provides a continuous stepless adjustment device, method, and application for electron beam based on the axial position control of the convergence point, belonging to the field of electron optics adjustment technology. The invention includes an anode body, an anode aperture, an electromagnetic focusing unit, and a fixed single-aperture main aperture, coaxially arranged along the electron beam propagation direction within the lens barrel of an electron optics system. This invention uses the axial position of the electron beam's convergence point relative to the fixed single-aperture main aperture as the control degree of freedom. The electromagnetic focusing unit continuously adjusts the displacement of the convergence point along the optical axis, achieving continuous stepless adjustment of the electron beam. By completely eliminating the mechanical moving parts of the aperture, this invention not only achieves continuous and smooth adjustment of the electron beam but also fundamentally avoids the vibration, contamination, and failure risks caused by mechanical movement. This significantly improves the reliability, repeatability, and long-term stability of the electron optics system, while simplifying the system structure and reducing manufacturing and maintenance costs.

This invention belongs to the field of underground mining, specifically relating to a method for recovering high-grade residual ore under loose rock cover. The method includes the following steps: S1: Constructing a grouting tunnel in the upper middle section of the residual ore pile at the bottom of the stope, adjacent to the intact ore body of a collapsed stope. This grouting tunnel serves as the construction site for grouting in the collapsed area. This method for recovering high-grade residual ore under loose rock cover effectively addresses the technical problem of ore recovery being impossible due to the collapse of the upper rock mass by constructing a concrete-loose rock mass hybrid structure through grouting. Through theoretical calculations, the strength and thickness of the hybrid structure are ensured to impede rock flow, allowing the ore recovery process to break free from dependence on the stability of the rock mass itself. This enables direct recovery of high-grade ore under loose cover conditions, effectively addressing the recovery limitations faced by traditional methods in severely collapsed stopes.

The utility model relates to the technical field of stop valve discloses a kind of stop valve to prevent valve flap rotation, comprising: valve body, valve flap and valve flap cover;Valve body is opened with the valve cavity for flowing medium, valve seat is installed in valve cavity, valve cover is installed on valve body;Valve stem is installed in valve cover;Valve stem is installed in valve cavity, valve flap is connected with valve stem, valve flap is driven to adhere or away from valve seat by valve stem to cut off or communicate valve cavity;One end of valve flap structure is fixedly connected with valve flap, other end is fixedly connected with valve stem.This structure prevents the unevenness of medium flow, drives valve flap to rotate, increases the wear of valve flap cover to valve stem.When high-speed or turbulent medium passes through valve, the risk that the traditional valve flap may rotate due to uneven impact of medium, leading to wear or sealing failure is eliminated.And by prohibiting rotation, significantly reduce the mechanical wear of valve stem, valve flap cover and valve flap, prolong the life of valve.

This invention discloses a method and device for detecting material level in a closed silo, relating to the field of industrial automation detection and control technology. It employs a photosensitive level gauge to continuously acquire the original optical feedback signal of the solid material pile within the silo, receiving the light source sensor signal as the original optical feedback signal, forming signal frames in chronological order, with each frame corresponding to the light intensity value at a sampling time. Dynamic baseline tracking is performed on the acquired multiple signal frames, updating the baseline in real time using the weighted moving average of historical signal frames, and extracting the current optical signal trend component. The baseline update rate is automatically adjusted according to the degree of signal fluctuation. A multi-frame fluctuation suppression algorithm determines the deviation between the current signal frame and the baseline, dynamically filtering out instantaneous spikes caused by dust adhesion based on the statistical characteristics of the deviation. This invention significantly improves the detection accuracy, anti-interference capability, and operational reliability of automatic feeding systems for solid materials in kilns, and is suitable for industrial sites with high dust levels, variable light paths, and long operating cycles.

The invention provides a particle discharging device and method for a Tokamak divertor area. The device comprises an adsorbent pump unit arranged in a divertor area and a gas channel structure communicated with the divertor area, and is used for capturing and discharging neutral particles generated by interaction of plasma and divertor components. The adsorbent pump unit is made of a non-evaporation type adsorbent material, has high adsorption capacity on hydrogen and isotopes thereof, can keep stable structure and working performance under the condition of high temperature, and is suitable for a high-heat-load and high-particle-flux operating environment in a divertor area. The in-situ air exhaust of the neutral particles is realized in the divertor area, so that the transport path of the particles is shortened, and the response speed and efficiency of particle discharge are improved. Meanwhile, the particle discharging device has large air extraction capacity and effective extraction speed, is suitable for tritium-related application scenes and operating environments with neutron irradiation, and has good engineering application prospects.

The application discloses a feedforward yaw moment control method based on vehicle lateral acceleration and dynamic load estimation, comprising the following steps: first, acquiring steering wheel angle, lateral acceleration and other sensor signals, calculating and smoothing the expected yaw rate; weighted fusion of measured and expected lateral acceleration to generate effective lateral acceleration, calculation of dynamic vertical load by adopting single-axis total load conservation roll correction method; calculation of reference feedforward torque based on left and right wheel load difference, then constraint of feedforward torque through residual adhesion coefficient; constraint of feedback torque through residual available torque, and finally superposition of feedforward and feedback torque and completion of distribution. The application solves the problems of low dynamic load estimation accuracy, adhesion constraint confusion and insufficient instability coordination in the prior art, and is suitable for distributed drive vehicles, and improves transient steering response and stability.

The application discloses a dental surgical tooth extraction car needle with a double depth setting mechanism, and relates to the technical field of medical devices.The car needle comprises a car needle body, wherein the car needle body has a working end and a handle portion, a blocking ball is installed at the joint of the working end and the handle portion of the car needle body, and a first mark point and a second mark point are installed on the surface of the working end of the car needle body.The car needle has the advantages that the first mark point and the second mark point are arranged on the surface of the working end of the car needle body, and the two mark points are sequentially arranged along the direction from the tip of the working end to the handle portion, so that a doctor can know the bone removal depth in stages by observing the level relationship between the mark points and the gum or the bone surface in a direct vision mode without relying on subjective hand feeling, the depth judgment is converted from experience dependence to visual confirmation, and the accuracy and the repeatability of the bone removal operation are significantly improved.

This invention relates to a paper-inspired bionic dual-segment flexible continuous robotic arm. The robotic arm employs a paper-inspired bionic dual-segment composite main structure design, with a one-piece molded flexible main body as its core. The elastic deformation of flexible hinges simulates the crease movement of paper folds, and combined with non-vector visual servo control, it uses line drive to achieve bending and precise positioning in confined spaces. This robotic arm is integrally molded using 3D printing technology, eliminating the mechanical gaps and connection failure risks associated with traditional assembly. Furthermore, it adopts an axial stiffness gradient design, offering advantages in high dexterity, high stability, and compact structure in confined space operations such as minimally invasive surgery and precision procedures.

This utility model provides a traction device, including: a frame, a traction seat, and a locking rod. The frame is movably arranged along a preset trajectory. The traction seat is installed on the top of the frame and is located on the side of the frame closer to the drying oven. The traction seat has an insertion slot that extends along the length of the frame. The insertion slot is for the insertion and engagement of traction fittings on the placement frame. The locking rod extends along the width of the frame and is movably inserted into the traction seat along the width of the frame. The side wall of the insertion end of the locking rod has a guide slope, and the locking rod has an initial state, a clearance state, and a locked state. When the traction seat is away from the placement frame, the insertion end of the locking rod is located in the insertion slot, and the locking rod is in the initial state. This traction device effectively solves the technical problem in the prior art where, after the profile has been dried, the operator needs to enter the high-temperature drying space to manually push out the placement frame.

This utility model provides a silicon wafer transfer device and a silicon wafer transfer system, relating to the field of photovoltaic technology. The silicon wafer transfer device includes an adsorption component and a switching component. The adsorption component has a first feeding mode and a second feeding mode. The switching component is connected to the adsorption component and is used to switch the adsorption component between the first feeding mode and the second feeding mode. The first feeding mode is used to transfer silicon wafers from a variable track to a first feeding track. The second feeding mode is used to transfer silicon wafers from the variable track to a first stacking tray. Based on the above, this application adds a new feeding mode without changing the original function of feeding to the basket, replacing manual operation, allowing users to select according to their needs, while eliminating the risk of silicon wafer scratches and breakage caused by manual operation, thus improving the silicon wafer transfer efficiency.

This utility model relates to a positioning structure for a grinding machine used in the production of chemical machinery parts, comprising a positioning disc and a shaft. The positioning disc is provided with several positioning elements for fixing cylindrical parts, and the shaft is provided with a connecting component and a driving component for expanding the positioning elements. This positioning structure of the grinding machine for chemical machinery parts production, by setting multiple positioning elements symmetrically distributed at the center to form a ring support, evenly disperses the radial force during grinding, solving the problem that single positioning points or asymmetrical clamping can easily cause parts to shake during grinding, resulting in substandard surface roughness. Furthermore, it uses positioning on the inner wall of the cylindrical part to avoid the clamping affecting the surface grinding process. Moreover, it uses flexible contact with a rubber sleeve instead of rigid clamping to eliminate the risk of scratches and deformation, solving the surface wear and deformation caused by conventional rigid clamping. Finally, it uses an electric push rod to drive the positioning elements to expand or contract synchronously, shortening the adjustment time and further improving production efficiency.

The application discloses a composite film material for a circuit board process, a preparation method of the composite film material, and a circuit board selective hole plugging method. The composite film material comprises a metal layer, a photosensitive layer arranged on a first surface of the metal layer, and a resin bonding layer arranged on a second surface of the metal layer. The resin bonding layer comprises an alkali-soluble resin and is used for bonding with the circuit board. The application uses the strong support of the metal layer and a specific formula design of the resin bonding layer to ensure that the film material can be cleaned and removed without residues by an alkaline solvent after experiencing an extreme heat process of 150 DEG C to 220 DEG C, and the yield and surface flatness of a selective hole plugging process of a high thickness-diameter ratio circuit board are significantly improved.