发布时间:2025-01-31 17:06:30
100*5的铜管大概13.3KG
紫铜管(外径-厚度)*厚度*0.02796
黄铜管(外径-厚度)*厚度*0.0267
所得出来的是每米的理论重量了。
江西省南昌市旧货市场在哪47从火车站出发47从洪城大市场出发怎样坐车
2025-01-31 17:06:30 2025-01-31 17:06:30 2025-01-31 17:06:30 2025-01-31 17:06:30 2025-01-31 17:06:30婚礼相关句子感人的结婚誓言经典台词推荐 电影里的经典婚礼誓词
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