valve center

• 阀芯

valve center的用法和样例：

例句

1. Remove the union nuts and end connectors from the valve cartridge first.
   首先从阀芯上拆卸管接头螺母和端口连接件。
2. It is held in place by the bonnet which is attached to the valve body by studs and nuts.
   阀盖将阀芯固定在适当位置，阀盖由螺线和螺母安装在阀体上。