发布时间:2025-01-27 23:24:47
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。
厕所墙面地面做了防水墙面还沁水装修师傅说是从墙角沁进去的像这样可以叫他返工吗
2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47初三物理 用锡焊的铁壶烧水壶烧不坏若不装水把它放在火上就要烧坏这是什么原因
2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47 2025-01-27 23:24:47