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person:(Yu, yuan)
System for preventing missing articles on automobile and control method thereof
Confluence type throttling speed regulation multi-way valve and accelerator linkage control system
Multi-way valve with microswitch and torque integrated control system
Compact double-hydraulic-cylinder telescopic arm with built-in inhaul cable and crane
Comprehensive desertification control device based on coma assembly
Multi-way valve and force limit integrated operation control system
Multifunctional propelling mechanism of cable pipe gallery underwater inspection robot
Wheel-crawler integrated multipurpose engineering van with double working devices
Auxiliary device for carrying relay protection debugging instrument