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期页期页77。J汽b八J gjt了1上9曰9自O口︹匕月任尸刁4 4 5 5 5 5 5 66一、一般问题 题目用“破坏半径”论一段多排爆破一段电雷管同时起爆的初步实践竖井车场联动化双机液压凿岩台车的改进梭式矿车实践搅拌输送机在我矿的应用索道运输自动装卸刮板式梭车风动自动风门四、选矿1
Period page Page 77. J steam b eight J gjt 1 on 9 said 9 from O mouth dagger month dead body Diao 4 4 5 5 5 5 5 66 First, the general problem with the “destruction radius” on a multi-row blasting a section of electric detonator at the same time detonated Preliminary practice shaft well yard linkage dual hydraulic drill rig improved shuttle car practice mixing conveyor in mine application cableway transport automatic loading and unloading scraper shuttle pneumatic automatic door four, beneficiation 1