供水主管道特别是地下管线很难监测。
Water mains are hard to inspect, particularly if they are underground.
负责煤气主管道、阀门及辅件的维修保养。
Be responsible for maintaining gas pipe, valve and other accessories.
主管道在严寒中冻裂了，煤气泄漏了出来。
The main pipe burst in the severe cold, and the gas has been getting out.
煤气从在严寒中冻裂的主管道中泄漏出来。
Gas has been getting out of the main pipe, which burst in the severe cold.
型号07-S应该安装在连接到主管道的消防喷淋系统处。
Model 07-S should be installed at the fire sprinkler service connection to the main line.
这个自来水主管道坏了，街道都被水淹了，所以我们没水用。
The water main broke and flooded the street, so we didn't have any water.
水管爆裂时，她的聪明才智使得她能够立刻切断主管道水源。
When the water pipe burst, she was intelligent enough to turn off the water at the main.
水管爆裂时，她的聪明才智使得她能够立刻切断主管道水源。
When the water pipe burst, she was intelligent enough to turn off the water at the main.
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