发布时间:2025-02-03 14:52:09
20厘米。彩钢板屋檐突出最后一班达到20厘米上一位,这样才可以让雨水不会侵蚀到里面去,又不会因为没支架而掉下来,大过了20厘米就会因为自身重量而掉下里,所以20厘米正好合适。
广东省只有7家市政公用工程总承包资质特级资质广州有4家深圳有2家汕头有1家
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