高密度聚乙烯大口径中空壁缠绕管
high density polyethylene pipes
大口径管材
large diameter pipe
large caliber pipe
large caliber winding pipe
空中大绕环
grand rond de jambe en l’air
ouverture de jambe; grand rond de jambe en l’air
ouverture de jambe
中大口径高合金管材
Large-medium sized hi-alloy steel tubular products
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