发布时间:2025-01-20 21:08:10
不一定,如果空气中湿度比较大,然后温度在22度左右还有就是铁钉是否合金是否有度层!
根据建筑设计防火规范gb5001620142018 版下列关于设置消防电梯设置中错误是
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