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METHOD OF SUPPORT OF STRATAL WORKINGS AT DEEP HORIZONS
METHOD OF SUPPORT OF STRATAL WORKINGS AT DEEP HORIZONS
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机译:深层水平工作的支持方法
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摘要
A method of support of stratal workings at deep horizons includes mounting of support frame in arch form, this comprises the roof beam and the posts connected to each other with yokes by means of cramps with slats and nuts, the gaps of the frames are closed with inter-frame enclosure. Fixation space is filled with foaming tar.
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