oil ring;lubricated ring

To solve these problems,steel rings were replaced by lubricated rings.

介绍了钢质钢领在玻璃纤维并捻生产中存在的一些问题,为了解决这些问题,采用含油钢领替换钢质钢领在玻璃纤维并捻机上使用。

Zn-Ni alloy electroplating of steel oil pipe;

输油钢管电镀Zn-Ni合金