发布时间:2025-01-27 22:56:20
红色为正,红黑为负。一般是暖色做正极(相线)如红色、橙色,冷色做负极(零线)如绿色、黑色,地线都是统一黄绿双色相间。
24米宽高17的客厅开两扇700的断桥铝窗户请问窗户开两边还是中间好
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