煤气管

gōng rén men wā le yī tiáo gōu lái pū shè méi qì guǎn

工人们挖了一条沟来铺设煤气管。

Workers dug a trench for gas lines.

méi qì guǎn bào liè yǐn qǐ zhè cì bào zhà

煤气管爆裂引起这次爆炸。

A gas pipe that had burst caused the explosion.