老熟女草bx×_9re热国产这里只有精品_av性色在线乱叫_无遮挡又色又刺激的女人视频_国产成人一区二区视频免费_在线a亚洲v天堂网2018

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.