大口径管材
large diameter pipe
large caliber winding pipe
large caliber pipe
取排水口水工布置
hydraulic arrangement of water intake and discharg
给水排水管道
feed water and drainage pipeline
feed water and drain pipeline
长距离大口径PCCP输水
long-distance and super-large diameter PCCP pipeli
大管径长距离平坦管道
long distance and large diameter flat pipeline
大管径流量测量
large diameter pipe flow measurement
大管径输水管道
big caliber convey water pipes
大口径、长焦距平行光管
large-aperture and long-focus collimator
大口径3PE防腐
big caliber piping 3PE antisepsis