Anti-collision distribution type car door device and design method thereof
Fork reciprocating movement device pressing to unlock and then rotating
Assembly type floor veneer integrated board convenient to hoist
Rail engineering vehicle equipment room structure with ventilation and heat dissipation system
Environment-friendly riverway cleaning device based on heat storage expansion double-layer cleaning
Turnover device for riprapping leveling ship and riprapping leveling ship
Large-drift-diameter rectangular sealed cabin door device of manned spacecraft