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7.7.5 室外给水管管顶最小覆土深度不得小于土壤冰冻线以下0.15m，行车道下的覆土深度不宜小于0.7m，当不能满足时应采取防护措施。isnounaugburdh
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建筑与工业给水排水系统安全评价标准 GB／T 51188-2016

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