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1.The hinged manhole is designed to allow easy access to the underground sewer system.
铰链式人孔设计为便于地下污水系统访问。
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2. The construction of this hinged manhole will require a significant amount of time and resources.
这个铰链式人孔的建设将需要大量的时间和资源。
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3. The hinged manhole was installed in the basement to improve air circulation and prevent mold growth.
铰链式人孔安装在地下室以改善空气流通并防止霉菌生长。