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person:("wang yiwei")
Expressway barrier-free rescue and troubleshooting device
Novel air-cooled high-current DC quick-charging cable
Railway vehicle buffer device and coupler buffer system
Multi-line aerated concrete plate grabbing manipulator
Sweeping system of aerated building block stacking platform
Laminated beam stirrup anti-inclination device with lightweight design
NFC high-precision positioning method for wireless flat shunting system
Auxiliary device for bridge crane installation and bridge crane installation method