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2. All piston rod have to go through comprehensive processing : Heating →Vehicle processing→ Grinding→Polishing→Plating hard chrome→Polishing ,Pp Material Dead Lock Round Tags Plastic Security Safety Seal - Joint Technology Co. Ltd,wearable and acid.

3. Andvanced surface treatment:

a. Environmental automatically pipelined painting

b.Handle Lock Door Lock Electric Lock - Joint Technology Co. Ltd

c. Assembling in seal clean workshop

Technical parameters：