Two routes can not be worn in the same tube, wire and heating, hot water, gas pipe between the parallel distance should not be less than 300mm, the cross should not be less than 100mm.
两路线不能穿同一管内，电线和暖气、热水、煤气管之间的平行距离不应小于300mm，交叉距离不应小于100mm。
Two routes can not be worn in the same tube, wire and heating, hot water, gas pipe between the parallel distance should not be less than 300mm, the cross should not be less than 100mm.
两路线不能穿同一管内，电线和暖气、热水、煤气管之间的平行距离不应小于300mm，交叉距离不应小于100mm。
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