色欲狠狠躁天天躁无码中文字幕,国产情侣久久久久aⅴ免费,国产精品久久久久久妇女3D,国产精品久久国产精麻豆96堂,欧美性受XXXX黑人XYX性爽


NEWS

Hydraulic cylinder piston rod crawling solution

1783 2019/08/27
1. should adjust the coaxiality of the piston and the piston rod.
2. the machining accuracy of the inner wall of the cylinder and the surface of the piston rod are adjusted to the appropriate range.
3. if it is caused by the material of the seal, just replace it.
4. add a venting device in the hydraulic cylinder to discharge air.
5. should adjust the gap between the piston and cylinder, piston rod and guide sleeve inside the hydraulic cylinder.