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1.The construction crew carefully replaced the old branch manhole with a new one.
施工队小心翼翼地用一个新的代替了旧的分支井盖。
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2. The branch manhole is designed to provide additional support for the underground pipelines.
这个分支井盖的设计是为了为地下管道提供额外的支撑。
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3. The maintenance team has been working on replacing all the faulty branch manholes.
维修团队一直在更换所有的损坏的分支井盖。