The city tore up the street tolay a new water pipe.
该市将路面挖开以铺设一条新水管。
2
The city tore up the street tolay a new water pipe.
在两座城市间正在铺设一条油管。
3
At present, the common underground pipelines are steel tube, reinforced concrete pipe, and PVC hard plastic tube. The cost of them is much high and it is also difficult tolay out.