456,Tongyuan North Road, Luotuo Industrial Zone,Zhenhai,Ningbo,China.
Ningbo Zhengdu Transmission Appliance Co., Ltd., founded in 1998, is a professional manufacturer of massage chair movements and accessories as well worms, matched worm gears helical gears, screw rod set transmission mechanisms, integrating the design, ...
worm shaft,gear shaft,worm gear,gearbox,Massage armchair mechanical movement assembly