Expansion joints of various kinds are fitted on gas mains.
各种各样的伸缩接头被
装在煤气的总管
。
Expansion joints of various kinds are fitted on gas mains.
各种各样的伸缩接头被装在煤气的总管。
Expansion joints of various kinds are fitted on steam pipes.
各种各样的伸缩接头被装在蒸气管。
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