3D printing product post-treatment wax coating lifting mechanism
Agricultural machinery gearbox with differential lock function
Airplane auxiliary fuel tank oil cover sealing structure
All composite material lightweight fuel tank shell for aircraft
Arrangement structure of small railway freight yard provided with annular road
Articulated axle type steering system of integral frame engineering vehicle
Automobile charging module with air volume control device
Construction and installation method of large ventilation duct
High-integration-level intelligent wheel leg with independent turning lifting function