常乐机考判断1-500

筒形磨煤机最佳转速与圆筒直径有关,圆筒直径越大,最佳转速越大。

发布于 2021-03-24 04:12:57

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野百合也有春天 2023-03-24

这家伙很懒，什么也没写！

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