泵测压孔位置
pump pressure tap location
封孔测压
hole sealing for pressure measurement
换向离合器测压孔
reverse clutch pressure tap
换向离合器测压孔旋塞
reverse clutch pressure tap plug
降速阀喉颈部测压孔
underspeed valve throat pressure tap
降速阀上流测压孔
underspeed valve upstream pressure tap
膜片式钻压测量装置
diaphragm-type weight unit
前进离合器测压孔
forward clutch pressure tap
前进离合器测压孔塞
forward clutch pressure tap plug