change valve

基本解释

By the analysis of the measuring results, the basic factors which would change valve timing were given.
在对测定结果分析的基础上提出了影响配气正时变动的主要因素。
The hydraulic cylinder can be used alone or connected in series. One end of the hydraulic cylinder connects to the motor driven change valve, the other end connects to the rod string.
液压油缸可单独使用，也可串联使用，它一端与机动式换向阀连接，另一端与抽油杆柱连接。
ip.com
The structure is: the pull rod (8) which is in the cylinder rod(1), the change valve(16) which is connected with cylinder(13) and the spring installation which is located on the left of plunger(9);
该机构的结构是：位于活塞杆（1）内腔的拉杆（8），与油缸（13）左部相连的换向阀（16），以及安装在活塞（9）左端的弹簧装置；
ip.com