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550results about How to "Guaranteed operational safety" patented technology

Modular multi-connection control method and system

The invention discloses a modular multi-connection control method and system. The control method comprises the following steps: determining the auxiliary engine capability requirement according to the total capability requirement of an indoor machine set and the best load point of a main engine; calculating the total number of the auxiliary engine compressors required to be input for the operation of the system according to the output capability of a single auxiliary engine compressor; and distributing the total number of the auxiliary engine compressors required to be input for the operationon average to each auxiliary engine, and distributing the parts which can not be distributed on average in each auxiliary engine one by one. According to the invention, through calculating the numberof the compressors required to be operated, the capability output of an outdoor machine set is basically and uniformly distributed to the main engine and each auxiliary engine of the outdoor machine set, the main engine and parts of auxiliary engine compressors are prevented from operating for a long time, the service life of each compressor of the whole machine set is prolonged, and the load energy efficiency ratio of the system part is improved greatly.
Owner:TCL AIR CONDITIONER ZHONGSHAN CO LTD

3DGIS+BIM-based road network operation comprehensive monitoring management platform and method

InactiveCN107194861AEffective decision makingImplement mock checksData processing applicationsTransmissionVideo monitoringData acquisition
The invention relates to the field of wisdom traffic information management and provides a 3DGIS+BIM-based road network operation comprehensive monitoring management platform and method. The platform comprises a 3DGIS+BIM fusion interactive application module, and a server module, a cloud service module, a video and event monitoring module, an electromechanical device module, a VR interactive module, a communication module, an emergency plan response module and a management and maintenance data analysis prediction module connected with the 3DGIS+BIM fusion interactive application module; the platform further comprises a data collection and transmission module and a sensor module; and the video and event monitoring module, the electromechanical device module and the sensor module are all connected with the server module through the data collection and transmission module. According to the platform and the method, comprehensive mastering of operation dynamic information can be effectively guaranteed; an emergency event can be timely discovered, quickly responded and effectively linked and handled, so that the management efficiency is greatly improved, the energy is saved, and the operation security is ensured; and in combination with the electromechanical device and control modules, operation management is orderly carried out, and intelligent and efficient operation management is achieved.
Owner:四川藏区高速公路有限责任公司 +1

System for treating organic exhaust gas by adsorptive-catalytic combustion

The invention discloses a system for treating organic exhaust gas by adsorptive-catalytic combustion. The system comprises a pretreatment filter which communicates with and sucks the organic exhaust gas, a main adsorption fan which exhausts the adsorbed exhaust gas and a main fixed adsorbent bed which is connected between the pretreatment filter and the main adsorption fan through a pipe and usedfor adsorbing the exhaust gas; the exhaust pipe of the main adsorption fan is connected with a gas monitoring apparatus which is electrically connected with a control device; the entrance of the mainfixed adsorbent bed is connected with a catalytic bed through a main desorption fan via a pipe; the exit of the catalytic bed is connected with the exit of the main fixed adsorbent bed through a pipe; a temperature sensor in electric connection with a control device is arranged in the catalytic bed; and the main fixed adsorbent bed is connected in parallel with an auxiliary fixed adsorbent bed which conducts an alternative adsorptive or catalytic process with the main fixed adsorbent bed. The invention has the advantages of effectively guaranteeing the treatment efficiency of the organic exhaust gas, replacing manual operation with automatic control and effectively improving the production safety degree, the equipment operation reliability and the economy.
Owner:深圳盈和环境物联科技有限公司

Orderly charging control method, controller and system

The invention discloses an orderly charging control method, controller and system. The orderly charging control method is suitable for direct-current charging piles and includes: and includes: acquiring real-time load of a station transformer, real-time charging demanded power of vehicles and real-time running condition of the charging piles; on the premise that the load of the station transformerdoes not exceed a limit, formulating an orderly charging strategy, and issuing the same to the charging piles, wherein the orderly charging strategy includes: charging the vehicles according to preset priority and preset output power of the charging piles if total charging demanded power of the vehicles does not exceed current residual power of the station transformer; when the total charging demanded power exceeds the current residual power, the charging piles with higher priority work at full power in a prioritized manner, and the charging piles with lower priority charge through power smooth adjusting. By the method, orderly charging of electromobiles is realized, and matching between charging load of the electromobiles and power supply capacity of a power distribution network is realized through orderly charging control by utilizing the characteristic of energy-type load of the electromobiles, so that power supply of the electromobiles and running safety of the power distributionnetwork are ensured.
Owner:SHANDONG LUNENG SOFTWARE TECH

Civil aviation air traffic control scene monitoring and guiding system

ActiveCN105812733ASolve the problem of poor monitoring accuracyEnhance the ability to guarantee safe operationImage enhancementImage analysisRoad traffic controlAir traffic control
The invention relates to a civil aviation air traffic control scene monitoring and guiding system. The system comprises a monitoring positioning device which collects and sends multi-point positioning monitoring information and video positioning monitoring information of scene traffic targets in real time; an application processing device which carries out association and identification integrated processing on the multi-point positioning monitoring information and video positioning monitoring information through combination of the information of an external system, thus obtaining the comprehensive monitoring information of the scene traffic targets, the warning information of the scene traffic targets, the conflict extrication suggestions of the scene traffic targets and the three-dimensional models of the scene traffic targets; and a user terminal device which comprehensively displays the scene traffic and integrally displays the comprehensive monitoring information of the scene traffic targets, the warning information of the scene traffic targets, the conflict extrication suggestions of the scene traffic targets and the three-dimensional models of the scene traffic targets. According to the system, the problem that the regional monitoring precision of a parking apron is low is effectively solved through adoption of a multi-point positioning device and a video positioning device, and the scene region of the airport is monitored seamlessly.
Owner:THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA

Synthesis loop for running test of converter valve for direct current power transmission project

The invention discloses a synthesis loop for the running test of a converter valve for a direct current power transmission project. The loop comprises a high-voltage power distribution system, a current source subsystem, a voltages source subsystem, an impact test subsystem, a short-circuit test subsystem, an alternating current filtering subsystem, a control protection system and an auxiliary system, wherein the auxiliary system comprises a low-voltage power distribution system, a water cooling system and a test parameter measuring system. The subsystems are integrated into one loop through reasonable circuit design, so the subsystems can be matched with one another to perform the running test of the converter valve; the loop has a simple structure and runs stably; and due to the control protection system, the running safety of the whole synthesis loop can be ensured, the service life of equipment is prolonged and failure rate is reduced. The synthesis loop can meet the requirement of the running test of the converter valve for the direct current power transmission project of +/-800kV/5000A and below; and tests prove that the synthesis loop can completely meet the requirement of all running test projects of a high-voltage direct current power transmission thyristor valve in the IEC60700-1:1998/GB/T 20990.1-2007 standard.
Owner:XIAN HIGH VOLTAGE APP RES INST CO LTD

Smart grid information transmission safety protection device and safety protection method

The invention discloses a smart grid information transmission safety protection device and a safety protection method, which relate to the technical field of smart grid information transmission safety. The device comprises a certificate server, an encryption and decryption module, a compliance check module and an exception handling module, wherein the encryption and decryption module is wholly serially connected between a station level and a bay level for carrying out encryption signature and signature verification decryption functions on original transparently-transmitted data; the compliance check module grabs a plaintext data packet in an offline or online mode and submits the plaintext data packet to the detection module for compliance check, and as for a compliance message, an analysis result is stored to a log database in a log format; and exception information is independently stored in an exception database through the exception handling module, and an administrator is notified. In the case of permissible delay in the smart grid, the encryption and decryption module together protects the internal information of the smart grid, behaviors that the internal data are tampered and destructed in the case of transmission are resisted, and the safety of the grid is further improved.
Owner:BEIJING UNIV OF POSTS & TELECOMM +2

System for oxidizing roasting-reducing roasting of titaniferous iron concentrate and roasting process

The invention discloses a system for oxidizing roasting-reducing roasting of titaniferous iron concentrate and a roasting process. A fluidized bed oxidation reactor is adopted for the oxidizing roasting of the titaniferous iron concentrate; the oxidized titaniferous iron concentrate enters a fluidized bed reduction reactor for reducing roasting; the reduced titaniferous iron concentrate is sequentially and spirally cooled by a cyclone cooler and water cooling and then enters a downstream section; and reduced coal gas is firstly subjected to heat exchange by the cyclone cooler, then preheated by a coal gas preheater, and enters a reducing furnace, latent heat of unreacted reducing gas in tail gas exhausted from the fluidized bed reduction reactor is firstly released through combustion in a combustion chamber, and hot flue gas generated by the combustion is mixed with the tail gas exhausted by the fluidized bed oxidation reactor and then enters a multi-stage cyclone preheater to exchange heat with the titaniferous iron concentrate for heat recovery. The system disclosed by the invention has the advantages of high reaction efficiency, full heat utilization, good economical efficiency in the roasting process and the like, and is suitable for large-scale continuous industrial production.
Owner:深圳中科九台资源利用研究院有限公司

Passive residual heat removal system of marine nuclear power device

The invention discloses a passive residual heat removal system of a marine nuclear power device. The passive residual heat removal system comprises a containment and a cooling heat exchanger. The containment is internally provided with a reactor pressure vessel, a loop cool pipe section, a loop heat pipe section, a steam generator, a refueling water tank, a 1# residual heat removal heat exchanger, a 2# residual heat removal heat exchanger and a cooling water pipe bundle; the refueling water tank is arranged at the top of the containment; the reactor pressure vessel and the steam generator are connected with the heat pipe section through the loop cool pipe section; the inlet and the outlet of the 1# residual heat removal heat exchanger are respectively connected with the loop heat pipe section and the loop cool pipe section; a main steam pipeline and a water supply pipeline which are connected with the inlet and the outlet of the 2# residual heat removal heat exchanger are arranged on the steam generator; upper and lower ends of the cooling water pipe bundle are respectively connected with the inlet and the outlet of the cooling heat exchanger. The passive residual heat removal system of the marine nuclear power device is independent from external power, is improved in capability of removing residual heat of reactor core through natural circulation, is improved in safety redundancy, power and operation stability, and guarantees operation safety of nuclear reactor.
Owner:SOUTHEAST UNIV

Construction method for tool changing under pressure in shield of water-rich silty soil and silty sand stratum under station tracks of railways

ActiveCN102758635AGuaranteed operational safetyOvercoming the risk of collapseTunnelsSoil scienceEarth surface
The invention discloses a construction method for tool changing under pressure in a shield of the water-rich silty soil and silty sand stratum under station tracks of railways. The construction method comprises the following steps of: carrying out reinforcement on a soil body at a tool changing position by adopting a high-pressure rotary jet pile; inspecting whether holes exist on the ground surface in the soil reinforcing area, and adjusting the tunneling posture and the tunneling direction of a shield machine; after reinforcing soil enters a cutting port of the shield machine, reducing the pressure of a soil warehouse, and adjusting construction parameters; injecting bentonite into the soil warehouse of the shield; determining an air pressure value, and determining a tool-changing air pressure value in the soil warehouse according to the obtained water-soil pressure value; and finally, clearing the warehouse, and reducing the pressure; and workers enter to change a tool, and after tool changing, the shield machine restores the tunneling working state. The construction method disclosed by the invention has the advantages that the risk that water-rich soft soil is easy to flow to cause collapse when the tool is changed under pressure in tunnel shield construction of the water-rich silty soil and silty sand stratum is overcome, and the operation safety of upper railways is ensured.
Owner:CHINA RAILWAY NO 2 ENG GRP CO LTD

Replacement system of organic Rankine cycle low-temperature power generation working medium and replacement method thereof

The invention provides a replacement system of an organic Rankine cycle low-temperature power generation working medium and a replacement method thereof. The replacement system of an organic Rankine cycle low-temperature power generation working medium comprises a vacuum pump, a booster pump, a working medium hold-up vessel and a fluid reservoir, wherein the output end of the vacuum pump is connected to the input end of the booster pump by a first valve; the output end of the booster pump is connected to the steam generator of a circulating system by a fourth valve; the booster pump is connected to the working medium hold-up vessel by a third valve; the other end of the working medium hold-up vessel is connected to the fluid reservoir by a second valve; and meanwhile, the fluid reservoir is also respectively connected with the vacuum pump and the condenser of the circulating system. When working medium needs to be injected into the low-temperature power generation system of the organic working medium, air is extracted from the circulating system by the vacuum pump to cause the system to generate vacuum degree; the working medium is injected into the fluid reservoir by differential pressure to inject the working medium; and when the low-temperature power generation system halts and needs to recover the working medium, and the working medium in the fluid reservoir is injected back to the working medium hold-up vessel by the booster pump, thereby recovering the working medium.
Owner:XI AN JIAOTONG UNIV

Wet-type dust-removal fan

The invention discloses a wet dust removal fan, which comprises a wind-cone. The wind-cone consists of the wall of an outer cone and the wall of an inner cone which is provided with a plurality of through holes. A sandwich cavity is arranged between the wall of the outer cone and the wall of the inner cone; a flow port is opened at the bottom of the wall of the outer cone; a seeper box is connected with the lower part of the wall of the outer cone and is correspondent to the flow port; an outlet is arranged at the bottom of the seeper box; the inner wall of the inner cone is provided with a support which is equipped with an axle; the support is connected with the wind-cone and is arranged between a water injection nozzle and a fan wheel, and the axle is provided with at least a separating blade. The wet dust removal fan has the advantages of high purification efficiency in the practical application, low operational cost, notable energy saving effect and no frequent maintenance, which completely solves the problems that large resistance of the dust removing system exists owning to a filter screen, the handling ability of blast volume is bad, the increasing of the loading of a fan motor is directly affected by the dust capacity adsorbed of and the fan motor is burnt down easily owing to the phenomenon of blocking, thus ensuring the operation safety and work efficiency of the fan motor.
Owner:郭峰

Novel auxiliary feeding device for plate rolling machine

The invention discloses a novel auxiliary feeding device for a plate rolling machine. The auxiliary feeding device comprises a discharging platform, a vacuum chuck mechanism, a lifting mechanism, a plate conveying mechanism and a plate aligning device; the discharging platform is arranged on the left side of a rack; the vacuum chuck mechanism is fixed to the lifting mechanism through screws; servo motors are mounted on a horizontal guide rail and a vertical guide rail of the lifting mechanism and drive the lifting mechanism to work; the plate conveying mechanism is fixed on the rack through bolts; chain wheels are driven by a motor to rotate, and then roller shafts rotate; and the plate aligning device is arranged below the plate conveying mechanism and is driven by a servo motor to work. The feeding action of the plate rolling machine is controlled by a programmable logic controller (PLC) to be completed automatically and does not depend on manpower and hoisting equipment excessively, the labor intensity of workers is reduced, the feeding action is stable, the plate rolling accuracy, the production efficiency and the safety are improved, and the auxiliary feeding device for the plate rolling machine is high in efficiency and high in safety.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

High-efficiency transmission system for vehicle wireless video monitoring

The invention provides a high-efficiency transmission system for vehicle wireless video monitoring. The high-efficiency transmission system comprises a video monitoring vehicle-mounted front end for capturing and digitally acquiring various pieces of information in real time, a vehicle-mounted information recording platform for recording and processing the acquired information and encoding audio and video data, a vehicle information fusion module for respectively fusing acquired beidou/GPS (global positioning system) positioning information with sensor information and audio and video information to form sensing information and audio and video information which are provided with the positioning function, a vehicle-mounted information management module for managing the recorded information, and a monitoring center, wherein the beidou/GPS positioning information of a vehicle is transmitted to the monitoring center in real time, and the audio and video information is dynamically transmitted and controlled according to an actual running condition of the vehicle and a requirement of the monitoring center. According to the high-efficiency transmission system for the vehicle wireless video monitoring, a wireless transmission requirement can be greatly reduced; under a condition of guaranteeing the running safety, the running cost is reduced, and the high-efficiency transmission is realized.
Owner:GUANGXI XINLANG COMM TECH

Scroll gas-liquid multiphase mixing transmission pump

InactiveCN101603530ABroaden the range of gas-liquid ratioNo reduction in volumetric efficiencyRotary piston pumpsRotary piston liquid enginesLiquid mediumInvolute
The invention discloses a scroll gas-liquid multiphase mixing transmission pump composed of a movable scroll pan, a fixed scroll pan, a frame body, a crankshaft, and a small crank anti-rotation mechanism; the movable scroll pan and the fixed scroll pan with the same shaped wires relatively rotate 90 degrees, and are offset for certain distance, and then the movable scroll pan and the fixed scroll pan are inserted into each other to form a plurality of working cavities; under the driving of the crankshaft, the movable scroll pan realizes revolution and translation with the fixed scroll pan under the constraint of the anti-rotation mechanism of the small crank so as to form the working cavity volume with cyclic variation, and the absorption, compression and discharging of gas-liquid medium are realized. The movable scroll pan and the fixed scroll pan are both provided with a section of variable back lash scroll wrap composed of reducing base circle involute; during working, back lash exists, so that a pressure relief path exists in the discharging port direction from a compression cavity; in the pressurizing process, a small quantity of gas-liquid medium generates internal leakage via the path from the compression cavity to the discharging port so as to realize random unloading for liquid phase compression, which solves the problems that pressure surge and liquid impact are easy to appear during pressurizing mixing transmission gas-liquid medium when liquid holdup is higher.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

System and method for controlling concentration ratio of open type circulating cooling water system

The invention relates to a system and method for controlling the concentration ratio of an open type circulating cooling water system. The system for controlling the concentration ratio of the open type circulating cooling water system includes a control system and a cooling tower; a cooling tower water tank with a cooling tower water tank liquidometer is arranged below the cooling tower; the bottom of the cooling tower water tank is provided with a pollution discharge pipeline; the pollution discharge pipeline is provided with a circulating water conductivity meter, a circulating water temperature gauge, a pollution discharge electric control valve and a pollution discharge flowmeter; a water entering pipeline used for supplementing the cooling tower water tank with water is arranged above the cooling tower water tank; and the water entering pipeline is provided with a water supplementation flowmeter, a water supplementation conductivity meter, a water supplementation electric control valve and a water supplementation temperature gauge, wherein the water supplementation electric control valve is connected with the cooling tower water tank liquidometer. With the system and method of the invention adopted, automatic continuous and stable water supplementation and pollution discharge of the open type circulating cooling water system can be realized; automatic continuous on-line monitoring on the concentration ratio of circulating water can be realized; and concentration ratio fluctuation which is caused by intermittent water supplementation and pollution discharge of the circulating cooling water system can be avoided, so that the quality of the circulating water can be stabilized.
Owner:XIAN TPRI WATER & ENVIRONMENTAL PROTECTION

Ion-exchange process technique of hexavalent chrome-containing waste water

InactiveCN101357794AEasy to handleOvercoming the problem of decreased adsorption capacityIon exchange regulation/controlIon-exchange column/bed processesWater qualityIon exchange
The invention discloses an ion exchange treatment technology of wastewater containing hexavalent chromium, the ion exchange treatment technology combines the regulation of pH value of the wastewater, the absorption, the regeneration, the maintenance and the recovery of Cr<6+> ions, thereby realizing the automatic treatment of the Cr<6+> ions in the wastewater containing the chromium; the technology of the invention has high degree of automation and good treatment effect and can be applied in the large-scale water treatment; chromium removing columns are designed to three columns or multiple columns, intermediate tanks which can regulate the pH value are arranged among various ion exchange columns, when two columns or multiple columns are connected in series for working, the pH value can be regulated during the intermediate process, thereby ensuring the wastewater treatment effect to be better and being capable of overcoming the problem that the pH is changed due to the change of the concentration of the ions during the conventional ion exchange process, thereby causing the decrease of the absorption ability of the ions by the resin; the outlet water quality can stably maintain the Cr<6+> to be less than 0.5mg/L; ion exchange resin can be effectively maintained and be stably worked for a long time; regenerated liquid can be recovered, thereby saving resources.
Owner:SURFACE & INTERFACE CHEM ENG TECH RES CENT NANJING UNIV

BP bridge safety inspection vehicle and method for obtaining bridge surface physiognomy

The invention discloses a BP bridge safety inspection vehicle and a method for obtaining a bridge surface physiognomy. Equipment comprises a walking vehicle and a bridge physiognomy collecting system which is loaded on the walking vehicle, wherein the bridge physiognomy collecting system at least comprises a two-dimensional laser scanning device, an industrial CCD camera, a GPS system, an inertial navigation system and a main controller. According to the BP bridge safety inspection vehicle and the method for obtaining the bridge surface physiognomy, three-dimensional geometric shapes and texture image data of the surface of the outer contour of a visible bridge can be rapidly obtained in a high-precision mode, when the BP bridge safety inspection vehicle and the method for obtaining the bridge surface physiognomy are used, current safety conditions of a bridge structure are judged through comprehensive comparative analysis on history data obtained by the BP bridge safety inspection vehicle, therefore, operation safety of the bridge is guaranteed, bridge accidental collapse accidents are eradicated, a traditional bridge inspection method focusing on manual visual inspection is promoted to develop in an automatic, efficient, standardized and precise direction, and the BP bridge safety inspection vehicle and the method for obtaining the bridge surface physiognomy can also be used for conducting regular bridge safety check in an efficient, economical, practical and accurate mode.
Owner:CHONGQING JIAOTONG UNIVERSITY

Electromagnetic vacuum ultraspeed railway system

The invention discloses an electromagnetic evacuated ultraspeed railway system. The electromagnetic evacuated ultraspeed railway system comprises a housing and at least one transporting line which isarranged in the housing; the transporting line comprises an evacuated transportation tube and a train which is positioned in the evacuated transportation tube; and active collision avoidance devices are arranged between compartments of the train and the train head and the compartments. An external electromagnetic propulsion layer is arranged on the internal wall of the evacuated transportation tube; an internal electromagnetic propulsion layer is arranged on the external wall of the train; when the train penetrates through the evacuated transportation tube, homopolar magnetism pushes the trainto advance; and meanwhile, a power generation closed lead configured for the train cuts a magnetic induction line of the external electromagnetic propulsion layer to generate electric energy needed by running. The electromagnetic evacuated ultra-speed railway system is a people and object carrying integrated transportation system with a certain power generation capacity; and according to the electromagnetic evacuated ultra-speed railway system, requirements on external power supply are extremely low; under a mutual effect of an electromagnetic tube and an evacuated environment, the train running speed is highest, the energy consumption is lowest, no fear of influence from any weather is realized, the cost is lowest, and the input-output ratio is highest.
Owner:邱洪武

Novel son and mother unmanned aerial vehicle system

The invention relates to a novel son and mother unmanned aerial vehicle system which is composed of a carrying mother plane, a shooting son plane, an airborne winch system and a ground station. The carrying mother plane and the ground station transmit information through an instruction receiver and a wireless data transmission device, the instruction receiver is connected with a mother-plane flight control system, and the wireless data transmission device is connected with the mother-plane flight control system; a mother-plane power system is connected with the mother-plane flight control system, and a mother-plane power supply is connected with the mother-plane flight control system; the carrying mother plane is connected with the shooting son plane through the airborne winch system, one end of the airborne winch system is connected with the carrying mother plane, and the other end of the airborne winch system is connected with a son-plane flight control system; a son-plane wireless data transmission device and a son-plane wireless image transmission device are arranged in the son-plane flight control system which is connected with a cloud deck, an image shooting system is arranged in the cloud deck, the son-plane flight control system is provided with a servo steering engine, electric energy of the son-plane flight control system is provided by a son-plane power supply, and the servo steering engine is connected with a son-plane power system.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD QUZHOU POWER SUPPLY CO +2

Self-powered environmental-friendly street lamp and square lamp

The invention discloses a self-powered environmental-friendly street lamp and a square lamp, and belongs to the technical field of new energy power supply equipment system device. The self-powered environmentally-friendly street lamp and the square lamp comprise that: a main shaft (3) passes through a rain cover (2); a solar photovoltaic panel or horizontal axis wind-driven generator (1) is arranged at the top of the main shaft; and a vertical axis wind-driven generator is arranged in the middle part of the main shaft. The self-powered environmentally-friendly street lamp and the square lamp are characterized in that: the main shaft (3) made of a large-caliber steel pipe directly supports and is in through connection with the solar photovoltaic panel or the horizontal axis wind-driven generator so that the vertical axis wind-driven generator, the horizontal axis wind-driven generator and the solar photovoltaic panel are coaxially used so as to comprehensively utilize the three generation functions; a lamppost is provided with an air passage and an air inlet (12) to integrate the designs of the internal ventilation, heat dissipation and induced wind power and the external natural wind power with the internal structure of the generator into a whole, scientifically exert various natural potentials, reduce occupied space and obviously and effectively increase the generation effect.
Owner:陈国宝
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