降速阀喉颈部压力
underspeed valve throat pressure
降速喉颈部压力
underspeed throat pressure
电磁操纵降压阀
solenoid operated pressure reducing valve
调节降压阀
modulating pressure reducing valve
降速阀的工作
underspeed valve operation
降速阀切入工具
underspeed valve cut-in tool
降速阀上流测压孔
underspeed valve upstream pressure tap
降速阀上流压力
underspeed valve upstream pressure