发布时间:2025-01-17 01:17:43
更正一下:燕尾槽和键槽是两个概念。
燕尾槽用于工作台的导向。
键槽用于在轴类零件上安装键。
键槽没必要加工成燕尾形
燕尾槽也更不是键槽
现在很多超过100米的楼都要求设避难层按规定每隔15层设一个但是成都万象城是在19层和33层设避难层
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