鼻泪管插管
chronic dacryocystitis
intubation of lacrimal passage
储罐-波纹管-管道系统
tank bellow pipeline ( TBP ) system
杆井管道管理
pole and pipeline management
管道插入构件
inserted component of pipes
尿道插管术
urethral catheterizatioin
水平隧道管道
horizontal tunnel pipeline
主蒸汽管管道压降
pressure drop in steam-generator