先导管道口的识别
pilot line port identification
负荷控制阀先导管路
load control valve pilot line
转向计量泵先导管路
steering metering pump pilot line
沉没式井口导管架
submerged wellhead jacket
单腔气管导管
single-lumen endotracheal tube SLET
导丝和输尿管导管引导
Directed by leading wire and ureter conduit