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2. All piston rod have to go through comprehensive processing : Heating →Vehicle processing→ Grinding→Polishing→Plating hard chrome→Polishing ,shop Food Plastic Aluminum Foil Zipper Package/bag/pouch 3 Side Seal Zip Lock Type - Plastic Package Three Side Seal Zipper Type Package Glossy Logo Print - Joint Technology Co. Ltd,wearable and acid.

3. Andvanced surface treatment:

a. Environmental automatically pipelined painting

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c. Assembling in seal clean workshop

Technical parameters：