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Impact head and cutting cable composite forcible entry device
Intelligent retarder cooling control system and control method thereof
Light-avoiding sheet for automobile during night driving
Linkage device of trap port transition bridge and trap port cover of elevator
Rail traffic three-layer single-column assembly type overhead station
Special bird nest removing device for outdoor power equipment
Surface feature hyperspectral high-frequency observation system based on unmanned aerial vehicle
Three-floor and double-pillar assembled elevated station of rail transit