发布时间:2025-01-28 01:02:12
你要在图纸中找的正负0.00的水平位置,负数就是那个位置向下的数值,例如:天花是正负0.00
,--200.0就是天花下来20厘米的高度。
空气开关和漏电保护器的外观区别在哪里从哪里就能一下看出哪个是空开哪个是漏保请大师指导
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