roof waterproofing 基本例句 屋面防水 The roofer is patching the roof with metal.屋面防水工在用铁皮修补屋顶。 The article analyses the reasons of roof leakage, and proposes the measures of the quality control of the slantingroof waterproofing.摘要文章分析了屋面渗漏的原因，提出了斜屋面防水质量控制措施。