... 暖气管沟(热力)heating trench 室外管沟outdoor trench 雨水明沟rainwater channel ...
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outdoor pipe trench 室外管沟
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Outdoor cable trench are reinforced concrete trench with reinforced concrete cover plate.
室外电缆沟由钢筋混凝土砌成，上面加钢筋混凝土盖板。
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