Trunk line in ring configuration appropriate valves, cut off for inspection purposes.
且在环状主干线上配置适当之阀门, 以便检修切断之用.
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Traffic flow clearly falls on the trunk line after nine o'clock.
九点以后这条主干道的交通量明显下降.
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Like any highway system, the federal airways have their main trunk line.
同任何公路系统一样, 联邦航空线路也有其主航线.
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Our spinal cord is not merely a trunk line transmitting phone calls from the brain.
我们的脊髓不仅仅是一条传送大脑信号的中继线路.
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The main trunk line pipe valves general requirements of 30 and above life.
一般主干线管道阀门使用寿命要求30年以上.
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