短語(yǔ)詞組短語(yǔ)steel casing buried pipe 鋼套鋼直埋管道casing protected pipe 套管;保護(hù)管casing -pipe connected drilling tool 套管跟進(jìn)鉆具casing g pipe 套管welding of casing steel pipe 鑄鋼管焊接flexible protective casing for pipe 撓性保護(hù)管套casing pipe installation 套管敷設(shè) 返回 casing pipe