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煤礦設(shè)計風(fēng)巷及其下繞道炮掘作業(yè)規(guī)程

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In or der to e nsur e normal tea chi ng or der, pr otecti ng stude nts ' healt hy growt h, ensuri ng that nati onal (pr operty) is not lost, to pr event or mi nimize the occurre nce of safety accide nts, foll ow the "prevent, re scue ea ch other, e nsure safety and reduce l osses" pri nci ple, a ccording t o the l ocal conditi ons, make t he manageme nt system. 1, the principal i s the responsi bi

炮掘煤巷錨網(wǎng)支護(hù)施工的工藝改進(jìn)

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介紹了防治錨網(wǎng)支護(hù)在煤巷中出現(xiàn)網(wǎng)兜、片幫現(xiàn)象 ,進(jìn)行的工藝改進(jìn)。

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