This paper introduced the blasting of an underground outsize underprop in complicated conditions in detail.

介绍了在复杂环境下爆破拆除一地下特大钢筋混凝土支撑的技术难点。

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This paper introduced the blasting of an underground outsize underprop in complicated conditions in detail.

介绍了在复杂环境下爆破拆除一地下特大钢筋混凝土支撑的技术难点。

youdao