thickness of immediate roof的意思|示意
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直接顶板厚度
thickness of immediate roof的网络常见释义
直接顶厚度 文章详细信息 关键词: 回采巷道;;围岩稳定性;;直接顶厚度;;数值模拟 [gap=962]Keywords: gateway;stability of surrounding rock;thickness of immediate roof;numerical simulation