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person:(Kai, jiang)
Three-stage completely-free portal frame with staged lifting function and forklift
Assembled buoyancy tank and flexible connecting device thereof
Energy-saving intelligent traction device and using method
Traction device capable of reducing power consumption and use method
Lifting device convenient for high-altitude operation in power transmission major
Cantilever structure for internal occlusion type anti-falling railway contact net
Internal occlusion type anti-falling lengthened positioning double hooks
Occlusion anti-falling type butterfly-shaped fixing support
Unmanned aerial vehicle tree pruning combination tool