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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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。

youdao