1. 暗沟：covered floating roof tank 内浮顶油罐 | covered gutter 暗沟 | covered structure 潜伏构造
1. The waterproof construction of the roofing is composed of aluminum alloy board with verticalwelt, covered gutter, main gutter, eaves gutter, overflow and siphon rainwater drainage system, solving theproblem of low drainage capacity of previous public building roofing of similar large area.
系统相结合的构造防水方式，解决了以往类似规模大面积公共建筑屋面排水能力偏低的困扰。
2. The waterproof construction of the roofing is composed of aluminum alloy board with vertical welt, covered gutter, main gutter, eaves gutter, overflow and siphon rainwater drainage system, solving the problem of low drainage capacity of previous public building roofing of similar large area.
本工程屋面采用直立锁边咬合铝合金屋面板、暗天沟、主天沟、檐口天沟、增设溢流口及虹吸式屋面雨水排水系统相结合的构造防水方式，解决了以往类似规模大面积公共建筑屋面排水能力偏低的困扰。
3. French drain closed conduit covered gutter blind drainage subdrain...
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