常見例句雙語例句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(gòu)工作室；ip.comThe 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(jié)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。 返回 drift bolt