亚洲B2B网站,班长用她的玉足白丝帮我爽,99国产精品无码,亚洲 小说 欧美 激情 另类

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.