Expansion joints of various kinds are fitted on steam pipes.
各种各样的伸缩接头被安装
蒸气管道上了。
Expansion joints of various kinds are fitted on steam pipes.
各种各样的伸缩接头被安装蒸气管道上了。
Expansion joints of various kinds are fitted on gas mains.
各种各样的伸缩接头被安装煤气的总管道上了。
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，
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