常乐机考判断1-500

只有当工作介质压力不高于1.96MPa,工作温度不高于300℃时,阀门壳体才许用碳素钢制成。

发布于 2021-03-24 04:13:07

【判断题】

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退役熬夜冠军 2023-03-24

这家伙很懒，什么也没写！

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