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Sliding glass door wedge
ActiveUS12234684B2Rain/draught deflectorsWing arrangementsStructural engineeringAtmospheric sciences
A rain deflector apparatus provides a declined body surface to deflect water away from a sliding glass door (or similar structure) and a compliant base portion that can be sealably inserted into the sliding glass door's track (or similar structure) in order to prevent water and debris from collecting in the track and making its way under the door. In a preferred embodiment, the rain deflector apparatus is secured to the glass of the sliding glass door by way of one or more suction cups. The suction cups are selected such that their holding force to the glass is sufficient to keep the upper edge of the apparatus pressed up against the glass and the lower edge in sealed relation to the track or floor.
Owner:STORM SHIELD OF MIAMI INC
Unmanned aerial vehicle express cabinet
The invention provides an unmanned aerial vehicle express cabinet which comprises a cabinet body, and the cabinet body is provided with a parking platform, an express access port, an express sending and taking port and an inner cavity; the unmanned aerial vehicle positioning assembly is used for driving the logistics unmanned aerial vehicle to move to a taking and unloading position and a taking-off position on the parking platform; the sliding door assembly is used for being in driving fit with a box door of a logistics box of the logistics unmanned aerial vehicle; and the express pick-and-place mechanism is used for driving the express to move between the express access port and the express pick-and-place port. According to the unmanned aerial vehicle express cabinet, the box door of the logistics unmanned aerial vehicle is driven to be opened synchronously through the sliding door assembly, and the structure of the logistics unmanned aerial vehicle is simplified; the unmanned aerial vehicle positioning assembly can position the logistics unmanned aerial vehicle to a taking and unloading position and a take-off position, and the requirement that the logistics unmanned aerial vehicle is positioned to the sliding door assembly and the take-off position is met; and the express pick-and-place bin, the pick-and-unload positions and the positions of the multiple express storage bins are reasonably arranged, the size of the whole cabinet body can be reduced, and the structure of the express pick-and-place mechanism is simplified.
Owner:GUANGZHOU YUNJIE CHUANGXIANG AVIATION TECHNOLOGY CO LTD
Roller assembly
Disclosed herein is a roller assembly for a sliding panel, the roller assembly including at least one roller sub-assembly having at least one roller wheel, the roller sub-assembly comprising at least one pivotal arm and a roller wheel rotatably mounted to the arm, wherein one end of the arm is configured for pivotally attachment to the support to permit the arm and roller wheel to pivot relative to the support in a vertical plane and the opposite end of the arm has resilient suspension means configured to allow resilient pivotal movement of said opposite end relative to the support when a force is applied to the roller wheel.
Owner:ANTHONY INNOVATIONS
Panel door with radial track detachable hinge system and method
Owner:BOLDEN REGGIE L
Sliding door unit and components for the same
ActiveUS12270236B2Building locksConstruction fastening devicesClassical mechanicsStructural engineering
Owner:ENDURA PRODS INC
Integrated door assembly of a prefab modular shed
The present subject matter discloses an integrated door assembly for a prefabricated shed constructed from modular plastic components or panels. The door assembly comprises a door panel that includes a door side panel and a door body, which are integrally formed through blow molding. The door body is connected to the door side panel via an embedded folding groove, featuring a thinner plastic material at the fold to allow for flexibility and ease of movement. Additionally, the door assembly incorporates a pivotable frame bracket that encases the edges of the hinged, rotating panels, enhancing both strength and durability.
Owner:YIXIANG BLOW MOLDING FURNITURE (NINGBO) CO LTD
Door Assembly with an Engagement Assembly
PendingUS20250304235A1Aircraft accessoriesKeyhole guardsStructural engineeringMechanical engineering
A door assembly configured to be mounted in an opening of a cabin area of an aircraft. The door assembly includes a door configured to be movable between a deployed position across the opening and a stowed position out of the opening. A lock is mounted to the door and movable between a locked position and an unlocked position. An engagement assembly is mounted to the door and movable between an engaged position and a disengaged position. The engagement assembly includes a plunger, a lock mechanism, and an elongated member that extends between the lock and the lock mechanism. In the engaged position, the lock mechanism and the elongated member position the plunger in an extended position outward from the door. In the disengaged position, the lock mechanism and the elongated member position the plunger in a retracted position relative to the door.
Owner:THE BOEING CO +1
Expandable lavatory for full-size wheelchairs
An expandable lavatory for full-size wheelchairs may comprise an aircraft lavatory door system with a forward door and an aft door wherein both doors are capable of expanding into an expanded locked position. The expandable lavatory for full-size wheelchairs may comprise a first single lavatory, a second single lavatory, a collapsible divider, and a lavatory door system which functions to provide a door to each single lavatory and a door for a configuration in which the two single lavatories convert into one expanded double lavatory. The expandable lavatory for full-size wheelchairs may be a forward lavatory facing the aisle in proximity to a first galley, a second galley, and a wheelchair tie down space.
Owner:BE AEROSPACE INC
Main landing gear cabin door mechanism, aircraft and folding and unfolding method
ActiveCN119527539AReduce the windward arealow aerodynamic loadPower-operated mechanismWing arrangementsFlight vehicleMechanical engineering
The invention provides a main landing gear cabin door mechanism, an aircraft and a folding and unfolding method. The main undercarriage cabin door mechanism comprises a left cabin door and a right cabin door, one end of the left cabin door is provided with a first retractable driving mechanism, one end of the right cabin door is provided with a second retractable driving mechanism, and a small cabin door is hinged to the side, close to the right cabin door, of the left cabin door; the small cabin door and the left cabin door are provided with third folding and unfolding driving mechanisms which can respectively drive the small cabin door and the left cabin door to rotate; in the first position, the left cabin door and the right cabin door are both in a vertical state, and the small cabin door and the left cabin door are folded and overlapped; and at the second position, the left cabin door, the small cabin door and the right cabin door are horizontally positioned on the same plane. The small cabin door can be independently retracted and folded, after the cabin door is opened, the folded small cabin door can reduce the windward area of the cabin door in the put-down state, the pneumatic load borne by the cabin door is reduced, and the design of a driving mechanism for retracting and releasing the cabin door is lighter.
Owner:LANDING GEAR ADVANCED MFG
Artificial intelligent fireproof smoke exhaust window
The artificial intelligent fireproof smoke exhaust window comprises a ventilation window body, a window sash is arranged on the right side of the ventilation window body, fireproof sound insulation glass is installed in the window sash, the bottom end of the window sash is hinged to the bottom end of the right side of the ventilation window body, and a driving assembly is arranged between the window sash and the ventilation window body; a smoke exhaust assembly used for exhausting smoke outwards is arranged between the upper end of the ventilation window and the window sash. The driving assembly and the smoke exhaust assembly are arranged between the ventilation window and the window sash, the smoke alarm, the temperature sensor and the equipment box are arranged on the right side of the ventilation window, the equipment box can receive signals transmitted by the smoke alarm and control the electric telescopic rod to be started, and the electric telescopic rod drives the window sash to be opened; and meanwhile, in the opening process of the window sash, a T-shaped groove, a T-shaped block and a guide block can drive a movable plate to be overturned and opened, so that a fan corresponds to an exhaust channel, the fan exhausts smoke, the smoke exhaust effect is improved, and safety accidents are avoided.
Owner:GUANGZHOU TAICHANG IND
Primary and secondary fusion complete ring main unit
ActiveCN119627661Aeasy to openEasy to fixWing fastenersSubstation/switching arrangement casingsClassical mechanicsStructural engineering
The invention discloses a primary and secondary fusion complete ring main unit, and relates to the technical field of ring main units, the primary and secondary fusion complete ring main unit comprises a box body, the front and back surfaces of the box body are connected with front doors, the two opposite side surfaces of the box body are hinged with side doors, the front doors comprise two sliding doors and rotating doors hinged with the sliding doors, the sliding doors are slidably connected with the box body, and the rotating doors are hinged with the sliding doors. A door locking device is arranged between the two rotating doors, the rotating doors are connected with clamping blocks, and clamping grooves allowing the clamping blocks to be inserted therein are formed in the outer sides of the sliding doors. When the front door needs to be opened for maintenance, the door locking device is opened, the rotating door is pulled to rotate by 180 degrees to be attached to the sliding door, the clamping block is inserted into the clamping groove, the rotating door and the sliding door are relatively fixed, and internal electrical equipment is exposed. The front door combines the advantages of a sliding door and a rotating door, is convenient to open and fix, and is suitable for being applied to the front door with the width larger than 3 m.
Owner:ZHEJIANG HUBIAN ELECTRIC POWER TECH CO LTD
A heavy-duty automatic door using a linear bearing track
The present invention relates to the technical field of axially movable doors and windows, and specifically to a heavy-duty automatic door using a linear bearing track. The automatic door comprises a heavy-duty door, a moving mechanism, a supporting mechanism and an adjusting mechanism. An operator first starts the moving mechanism to move the heavy-duty door, and then uses rolling and replacement of rolling columns in the supporting mechanism to achieve rapid movement of the heavy-duty door. When it is necessary to stop, the adjusting mechanism is used to change the center of gravity of the heavy-duty door to achieve rapid stagnation. The device has a simple structure, effectively solves the inertia problem of rapid movement of heavy-duty doors using linear bearings and stagnation after movement, avoids damage to the mobile equipment, has good practicality and economy, and is beneficial to the promotion and use of the equipment.
Owner:HUNAN KANGNINGDA MEDICAL TECH CO LTD
Lifting type rotating shaft shower door
PendingCN119593674AEffective avoidanceMaximize space utilizationBathsDouchesMechanical engineeringShower
The invention relates to the technical field of bathroom appliances, and discloses a lifting type rotating shaft shower door which comprises a first sliding rail profile, a second sliding rail profile, a lifting air cylinder and a rotating shaft sliding door, a first cavity is formed in the first sliding rail profile, and an air cylinder fixing piece is arranged at a lower end opening of the first cavity; a convex part embedded into the first cavity is arranged on the second sliding rail profile, the interior of the convex part is hollow and forms a second cavity, an air cylinder limiting piece is arranged in the second cavity, and rotating shaft limiting pieces are arranged at the upper end and the lower end of the second sliding rail profile respectively; the lifting air cylinder is arranged in the second cavity, an output rod of the lifting air cylinder is connected with the air cylinder fixing piece, a cylinder body of the lifting air cylinder abuts against the air cylinder limiting piece, and the lifting air cylinder is used for driving the second sliding rail profile to ascend and descend relative to the first sliding rail profile. According to the lifting type rotating shaft shower door, the rotating shaft sliding door has a lifting function, so that a shower water valve and the like can be effectively avoided, and 180-degree barrier-free opening of the rotating shaft sliding door is realized.
Owner:ANHUI ASANAS INTELLIGENT MANUFACTURING CO LTD
Electric roller shutter door
The invention discloses an electric roller shutter door. The electric roller shutter door comprises a support assembly, a roller shutter door body and an electric roller shutter door body, the roller shutter door piece comprises a plurality of door piece bodies, the door piece bodies are sequentially connected in series, and the ends, in the length direction, of the door piece bodies are movably connected to the support assembly; the transmission shaft is inserted between the two adjacent door sheet bodies, the transmission shaft is provided with a protruding part protruding out of the roller shutter door sheet, and the protruding part is located in the track of the support assembly; the driving assembly is connected with the support assembly, and the driving assembly is matched with the transmission shaft so as to drive the roller shutter door piece to move along the track of the support assembly; and the at least one clearance compensation piece is connected with the two protruding parts located on the same side of the roller shutter door piece. In this way, the operation stability of the electric roller shutter door can be improved, noise can be reduced, and the service life of the electric roller shutter door can be prolonged.
Owner:ZHONGSHAN AUTO ELECTRONICS TECHNOLOGY CO LTD
Novel particulate matter-preventing energy-saving metro shielding door with adjustable tuyere
The invention relates to the technical field of metro platform screen doors, in particular to a novel particulate matter-preventing energy-saving metro platform screen door with an adjustable tuyere, which comprises a metro platform, and a plurality of left-side perforated platform screen doors and right-side perforated platform screen doors are fixedly mounted on two sides of the metro platform respectively; a rotating mechanism is movably connected to one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side, an automatic control system is fixedly connected to one side of one shielding door with holes in the left side, and a left tunnel and a right tunnel are correspondingly arranged on one side of each shielding door with holes in the left side and one side of each shielding door with holes in the right side. The automatic control system adjusts the angle of the rotary baffle and closes the holes in the shielding doors on the two sides through a control circuit, on one hand, the filter screen can filter out coarse particles, on the other hand, the shielding doors can block fine particles such as PM2.5, and therefore dispersion of the particles in the tunnel into the platform is reduced, and in summer, due to the fact that the holes of the shielding doors are closed, the shielding doors can not be blocked. The loss of cold air in the platform into the tunnel is reduced, and energy is saved.
Owner:NANJING UNIV
Expandable lavatory and cabin configuration including dedicated seating area and expandable lavatory
An expandable lavatory and an aircraft cabin configuration including the same. First, second and third walls form the lavatory interior and the third wall is repositionable to expand the lavatory interior footprint to accommodate a wheelchair. The third wall carries a door deployable when the third wall is in the expanded configuration such that the wheelchair can access the lavatory interior via an exit pathway. A first door positioned in the second wall provides access to the lavatory interior via a longitudinal aisle. In some embodiments, a wheelchair securement area is positioned longitudinally aligned with the second door, when the second door is deployed, such that wheelchair access to the lavatory is provided through second door when the lavatory is in the expanded configuration.
Owner:BE AEROSPACE INC
Composite curtain wall structure suitable for zero-carbon building
PendingCN120506039AMechanical apparatusLighting and heating apparatusArchitectural engineeringZero-energy building
The invention belongs to the technical field of curtain wall structures, and discloses a composite curtain wall structure suitable for a zero-carbon building, which comprises an inner side curtain wall and an outer side curtain wall. The inner side curtain wall is arranged on the building body and provided with a ventilation opening, an opening fan is arranged at the ventilation opening and can open or close the ventilation opening, the outer side curtain wall is connected to the inner side curtain wall, a ventilation cavity is formed between the outer side curtain wall and the inner side curtain wall, when the opening fan is opened, the ventilation cavity is communicated with the indoor space through the ventilation opening, and the outer side curtain wall is provided with an air inlet and an air outlet. The air inlet and the air outlet are both configured to be selectively opened or closed, and the ventilation cavity can communicate with the outside through the air inlet and the air outlet. By means of the arrangement, the composite curtain wall structure suitable for the zero-carbon building can flexibly adjust the ventilation mode, and energy consumption and carbon emission of the building can be reduced.
Owner:SHANGHAI ELECTRIC POWER DESIGN INST
Off-axis door assembly, door frame of off-axis door assembly and door leaf of off-axis door assembly
ActiveCN222478492UImprove sealingImprove sound insulationNoise insulation doors/windowsWindow/door framesJambMechanical engineering
The utility model discloses an off-axis door assembly, a door frame of the off-axis door assembly and a door leaf of the off-axis door assembly, the off-axis door assembly comprises the door leaf, the door frame and an inflation and deflation component, the door leaf is hinged to the door frame, at least one of the door leaf and the door frame is provided with a first sealing component capable of being inflated and deflated, and the door frame is provided with a second sealing component capable of being inflated and deflated. The inflating and deflating component is connected with the first sealing component, the inflating and deflating component is configured to be capable of inflating or deflating the first sealing component, the first sealing component has a bulging state and a deflated state, and the first sealing component in the bulging state is used for sealing between the door leaf and the door frame. The off-axis door assembly is good in sealing performance, and therefore the off-axis door assembly can have the good sound insulation performance, the good heat insulation performance and the like.
Owner:BEIJING PAIDAO TONGCHUANG E-COMMERCE CO LTD
Louver and louver handrail
PendingCN119266680ARealize functionturn easilyShutters/ movable grillesLight protection screensRotational axisDrive shaft
The invention discloses a shutter and a shutter handrail, and relates to the technical field of building decoration. The window frame extends in the first direction and is provided with a window opening penetrating in the second direction. The louver blade assembly is arranged in the window and comprises a plurality of louvers arranged in the first direction, and the two opposite ends of each louver are rotationally connected with the window frame; in the driving mechanism, a rotating driving part is used for driving a transmission shaft to rotate, the transmission shaft is arranged on one side of the louver blade assembly in the first direction and extends in the length direction of the louver blades, the two opposite ends of the transmission shaft are rotationally connected with the window frame, and at least one end of the transmission shaft and at least one end of each louver blade are coaxially provided with rotating parts. Each rotating piece is provided with two connecting ends symmetrical about the rotating axis of the rotating piece, transmission rods are arranged on the two opposite sides of the transmission shaft in the second direction, and each transmission rod extends in the first direction and is hinged to all the connecting ends located on the same side of the transmission shaft and the rotating piece. The transmission mechanism is good in rotation synchronism, good in sunshade and ventilation effect and low in transmission noise.
Owner:FOSHAN QITE TECH CO LTD
Door extrusion type door opening and closing sealing device for cleaning and disinfecting machine
The utility model relates to a door extrusion type opening and closing door sealing device for a cleaning and disinfecting machine. A plurality of sets of driving connecting plates are hinged to the side walls of the inner door and the outer door, the inner door is installed on the outer door through the driving connecting plates and vertically ascends and descends along with the outer door, the driving connecting plates are in an inclined state when the inner door ascends and descends, and an inner door top frame which is kept still relative to the cleaning and disinfecting machine is arranged below the inner door. After the bottom face of the inner door abuts against the top face of the inner door top frame, the connecting plate is driven to be in a horizontal state, pressure is applied to the outer side face of the inner door, and the inner side face of the inner door abuts against the sealing door rubber strip. The inner door applies pressure to the outer door through the inner door, then the inner door is tightly attached to the sealing door rubber strip through the pressure transmitted by the outer door, multiple extrusion sealing is formed, leakage of water vapor and chemical substances in the cleaning and disinfecting process is effectively prevented, the sealing performance of the hatch is ensured, and therefore the cleaning and disinfecting efficiency and effect are improved.
Owner:LIANYUNGANG YOUYUAN MEDICAL EQUIP MFG
Horizontal sliding window hardware system with locking function
PendingCN119411898AImprove synchronicityImprove stabilityBuilding locksMan-operated mechanismSash windowSlide window
The invention provides a horizontal sliding window hardware system with a locking function, which comprises a horizontal sliding hinge, a horizontal sliding driving mechanism, a transmission mechanism and a locking mechanism, and is characterized in that the horizontal sliding hinge is connected between a window sash and a window frame; the horizontal pushing driving mechanism is arranged on the window frame and used for providing acting force for driving the window sash to be opened or closed. One end of the transmission mechanism is connected with the output end of the horizontal pushing driving mechanism, and the other end of the transmission mechanism is connected with the window sash and used for opening or closing the window sash. The locking mechanism comprises a first locking assembly and a second locking assembly, the first locking assembly is connected to the output end of the horizontal pushing driving mechanism and located in the window frame, and the second locking assembly is arranged on the window sash. According to the scheme, the transmission mechanism and the locking mechanism are linked with the horizontal pushing driving mechanism at the same time. And the horizontal pushing driving mechanism and the transmission mechanism are arranged on the window frame together for linkage, so that the matching precision is reduced, and hardware is convenient to maintain.
Owner:SHENZHEN HOPO WINDOW CONTROL TECH CO LTD
Method for installing a profiled section
The invention relates to a method for installing a profiled section (1) with a total longitudinal extension (2) on a support structure (3) for a translational guide system (4) for a door assembly (5) of a piece of furniture (6) for covering another piece of furniture, having the following steps: - a first profiled piece (7) is connected to a connecting device (11) in a preparatory step, said connecting device (11) being integrally formed and / or being connected to the profiled piece (7) at precisely one first fixation surface (38), - the first profiled piece (7) is removed from a storage device (12) together with the preinstalled connecting device (11) which projects beyond the longitudinal extension (9) of the first profiled piece (7) in the longitudinal direction (8), wherein the longitudinal extension (9) of the first profiled piece (7) together with the connecting device (11) arranged thereon equals maximally 1200 mm, - at least one additional profiled piece (13) with a longitudinal extension (14) which is adapted to the total longitudinal extension (2) of the profiled section (1) is removed from a storage device (12) and is connected to the connecting device (11) preinstalled on the first profiled piece (7), the longitudinal extension (14) of the at least one additional profiled piece (13) equaling maximally 1200 mm, and - the first profiled piece (7) and the at least one additional profiled piece (13) or the profiled section (1) are arranged on the support structure (3).
Owner:JULIUS BLUM GMBH
Side sliding door with anti-shaking function
Owner:ZHONGSHAN YOUPU SANITARY WARE CO LTD
An anti-tailgating corner door control device and usage method
ActiveCN116971694BShutters/ movable grillesNon-mechanical controlsControl systemStructural engineering
The present invention relates to the technical field of anti-tailgating doors, and particularly to an anti-tailgating corner door control device and a usage method. The device includes a corner door, a lock tooth assembly, an electric door locking device, a sensor, and an in-built door closer device; alternatively, it further includes an external door closer device and a door shaft; or it further includes an external door closer device and a set of hinge hinges; the corner door includes a flat door and a shielding door, and the flat door and the shielding door are connected at a 90-degree angle; the lock tooth assembly and the electric door locking device are installed on the door frame, and the in-built door closer device is installed in the lower door frame or buried under the ground; the external door closer device is installed on the door frame, and one end of its arm is installed on the corner door; or the external door closer device is installed on the corner door, and one end of its arm is installed on the door frame. The device is designed with an angular door + access control system, achieving a small floor area, fast entry and exit of the warehouse door, and preventing tailgating entry and exit.
Owner:王克涛
Rubber belt conveying system at waterproof gate of underground metal mine
The invention relates to an underground metal mine waterproof gate rubber belt transportation system, and relates to the technical field of mine transportation, the underground metal mine waterproof gate rubber belt transportation system comprises a force bearing wall and a door closing mechanism, an incoming mine conveyor is installed in the force bearing wall, and a movable conveyor is arranged on one side of the incoming mine conveyor; an ore drawing conveyor is installed on the side, away from the incoming ore conveyor, of the force bearing wall, a door frame is installed on the side, close to the ore drawing conveyor, of the force bearing wall, a door plate is movably connected to the bottom of the door frame through a rotating shaft, and a door closing mechanism is arranged on one side of the door plate; the door closing mechanism comprises an oil cylinder controller fixedly connected with one side of the force bearing wall. The water level sensor installed in the force bearing wall can monitor the water depth in the force bearing wall in real time, when the water level exceeds a set threshold value, the ground control terminal sends out a signal, the driving mechanism is controlled to drive the movable conveyor to be dislocated from the mine coming conveyor, and the door closing mechanism is controlled to seal a mine pit.
Owner:ANHUI MAANSHAN IRON & STEEL MINING RESOURCES GROUP GUSHAN MINING CO LTD ZHONGJIU MINING BRANCH +1
Garage door with secure door assembly for packages
A Garage door with a secure door assembly including a garage door with a horizontally extending panel having a framework including parallel spaced apart horizontal members extending along a top edge and a bottom edge thereof and a secure package door assembly carried by the horizontally extending panel. The secure package door including an outer portion and an inner portion coupled together with the parallel spaced apart horizontal members captured therebetween. A door coupled by hinges to the outer portion and moveable between an open position and a closed position, A locking mechanism is included for locking the door in the closed position.
Owner:FROST JOE
Door system having a swing interlock system
A door system includes a header having a guide rail that has a central portion having a notch. A panel hanger is slidably coupled to the header. A door panel has a handle end portion releasably coupled to the panel hanger and a pivot end portion pivotably coupled to the panel hanger. The panel hanger and the door panel slide in unison between a closed position and a fully open position along a longitudinal plane. An interlock plate is positioned to extend upwardly from the door panel, and has a downwardly extending guide slot that slidably receives the guide rail of the header. When the door panel is in the fully open position, the interlock plate is aligned with the notch of the guide rail of the header in a direction orthogonal to the longitudinal plane to facilitate a pivoting of the door panel away from the longitudinal plane.
Owner:ALLEGION ACCESS TECH LLC
Component based frame and flexible sheet system for a large opening
A frame and flexible sheet system for an opening includes a top lineal track body with a top weather-stripping lineal, a bottom lineal track body, and an assembly component with articulating frame segment pair, swinging frame segment, and bottom weather-stripping lineals. The system further comprises an engagement and rolling component for the first top corner of the articulating frame segment pair, an engagement and pivoting component for the second top corner, and a bottom lineal track insert anchoring the bottom corner. The articulating frame segment pair is configured to hang from the top lineal track body. This system provides a versatile and efficient solution for enclosing and securing openings to spaces.
Owner:MARHAYGUE LLC
Unlocking mechanism and magnetic shielding cabin
PendingCN120465773AMagnetic/electric field screeningBuilding locksClassical mechanicsStructural engineering
Owner:杭州极弱磁场国家重大科技基础设施研究院