circulation port meaning in English
循环口
Examples
- The hsc - a hydraulic stage cementer features inner closing structure , opening through pressure difference . the closing plug drives the closing sleeve down and then shut circulation ports
型压差式双级注水泥器为内关闭式结构，不需投重力塞，通过液体的压力差打开循环孔，关闭塞带动关闭套下行关闭循环孔。