发布时间:2025-01-22 12:19:21
圆管理重=(外径-壁厚)*壁厚*0.02466
如果上面的48是外径那么就是:
(48-2.5)*2.5*0.02466=2.805075
sharpaquos电视怎么连接wifi夏普电视机无线网络连接方法
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