2022应急局金属非

下列断面为()类型的巷道在角隅处出现较大的应力集中。

发布于 2023-04-13 16:27:13

【单选题】
A 曲线形的巷道
B 梯形的巷道
C 椭圆形的巷道

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阿银。 2023-04-13

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deng_yulin

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