Vertical lifting and conveying system for open-pit mine trucks
Lattice type combined tower crane cable in foundation pit and erection method thereof
Ship body bracket and whole-ship lifting and transporting launching method
Controller of permanent magnetic synchronous motor for electric vehicle and vehicle-mounted system
Underwater suspended dynamic back-jointing tool and back-jointing method of mooring anchor leg
Magnetic friction coupling elevator disk brake utilizing magnetic field to regulate friction
Automatic folding type flap gate of construction lifter