白嫩人妻娇喘欲仙欲死,中文字幕人妻熟女人妻,国外亚洲成AV人片在线观看,色翁荡熄又大又硬又粗又动态图

Phone:13666718212Email: mldxtj_321@163.com

News

News Introduction

What are the enhancement measures to...

2018-04-04

What are the enhancement measures to improve the wear resistance of the screw barrel? According to foreign data reports, a problem often encountered in the extrusion ...

Read more

Bimetal barrel manufacturing process

2018-04-05

Bimetal barrel manufacturing process The cylinder body of the cylinder with processed inner and outer round cylinders...

Read more

What are the solutions to screw slewing ...

2018-04-01

What are the solutions to screw slewing in twin-screw granulator? Back pressure is too high: if the back pressure is set too high, then the screw ...

Read more