• Compared comprehensively, enclosed supports are better than non-enclosed supports; supports of square annular shape or "u" shape are better than supports of semicircle arch.

    综合比较来看,封闭式支架优于封闭支架;马蹄形环形支架要半圆拱等支护形式好。

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  • The equipment is mainly used for the shaping work of U-shaped steel arch support when it deforms, distorts or partial damages, to increase the number of profiles in the re-use.

    设备主要用于U型钢拱形支架使用发生变形、扭曲局部破损整形工作增加型材复用次数。

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  • For rock roadway layout layer, the necessity and feasibility of using nude alley, a hell of arch, the U-steel shed, bolt net and spraying and other forms of support are expounded.

    针对岩巷布置层位,阐述了采用、砌碹、u型钢多种支护形式并存必要性可行性

    youdao

  • For rock roadway layout layer, the necessity and feasibility of using nude alley, a hell of arch, the U-steel shed, bolt net and spraying and other forms of support are expounded.

    针对岩巷布置层位,阐述了采用、砌碹、u型钢多种支护形式并存必要性可行性

    youdao

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