国产裸体舞一区二区三区,久久发布国产伦子伦精品,日韩精品久久无码中文字幕,777精品久无码人妻蜜桃

Welcome to the official website of Wuxi Chenna Machinery Co., Ltd. (Changzhou Chenna Hydraulic Machinery Co., Ltd.)!
LANGUAGE：CNEN
Precision piston rod

Professional Sincere Honest Win-win

HOTLINE：

+86-158 9532 0613
 PROCESS 


1. Raw material peeling
2. Rolling straightening
3. Cutting
4. Coarse grinding



5. Heat treatment
6. Straightening
7. Precision grinding
8. Polishing before plating



9. Chrome plating
10. Polished after plating
11. Inspection
12. Packaging
13. Shipment

Copy right ? 2019 Wuxi Chenna Machinery Co., Ltd.(Changzhou Chenna Hydraulic Machinery Co., Ltd.) All rights reserved.