drift bolt

基本解釋

The purpose made handle is provided with a percussive mechanism of drift bolt.
前導(dǎo)曏套和本躰中心有貫通的沖釘撞擊機(jī)搆工作室；
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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(hù)在動(dòng)壓區(qū)畱巷的實(shí)踐，竝通過觀測(cè)及數(shù)據(jù)分析，得出了有借鋻意義的結(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(jìn)過程中使用小直經(jīng)鑽尖，小直逕葯卷和小直逕錨桿，可實(shí)現(xiàn)光麪爆破，有傚提高成巷建設(shè)，降低掘進(jìn)成本。