日韩久久久久-午夜精品久久久久-《色戒》高清无删减版-久久精品久久久久-国产精品久久久久精-国产精品第三页-国产精品99久久久久-亚洲视频色-free性黑人娇小videos,亚洲午夜精品久久久久久浪潮,搡老女人老妇搡老太的解决方法,日韩有码在线观看

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.