drift bolt

基本解釋

The purpose made handle is provided with a percussive mechanism of drift bolt.
前導向套和本體中心有貫通的沖釘撞擊機構工作室；
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The practice of bolt support in reserved coal drift in mining pressure area is introduced, helpful conclusion is obtained through observation and analyse.
介紹了煤巷錨桿支護在動壓區(qū)留巷的實踐，并通過觀測及數(shù)據(jù)分析，得出了有借鑒意義的結論。
This paper introduces driving rock drift with minor diameter bit, minor diameter cartridage and minor diameter bolt, it can realize smooth blasting, roadway speed is raised, driving cost is reduced.
在巖巷掘進過程中使用小直經(jīng)鉆尖，小直徑藥卷和小直徑錨桿，可實現(xiàn)光面爆破，有效提高成巷建設，降低掘進成本。