发布时间:2025-01-22 20:58:41
不是,金属屏蔽是在半导体的外面是铜皮材料,象高压电缆等。保护套是在电缆外是铝或铅,铁制材料,象平常说的铠装电缆。导体、主绝缘、半导体层、屏蔽层、绝缘填充物、铠甲护套、外层塑料保护层。接地时一般通过编制的铜辫用锡焊到屏蔽层上,然后再接到接地极上。
农村老房子有6年没住人了,但是保险每年都有交的,昨天晚上倒了,请问该怎么赔偿
2025-01-22 20:58:41 2025-01-22 20:58:41 2025-01-22 20:58:41 2025-01-22 20:58:41一件客厅的面积是48平方米用长8分米宽6分米厚01分米的木板铺地至少需这样的木板多少块
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