总管道
释义
main；
1.
Expansion joints of various kinds are fitted on gas mains.
各种各样的伸缩接头被安装在煤气的总管道上了.
2.
Water is supplied from the mains.
水是从总管道来的.
3.
The new house is not yet connected to the mains.
新房子(的水电)还没接上总管道.
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