发布时间:2025-01-20 21:11:51
夏天铁皮屋顶洒水可以降温3-5度左右。炎热的夏季在阳光的强烈照射下,铁皮表面温度能达50-70度。夏天铁皮屋顶洒点水,是可以起到很好的降温效果的。
怎么用双波长激光光源和光功率计测试光纤跳线的传输耗损和双头插入耗损
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