Thursday, September 15, 2022
Thursday, September 15, 2022
Monday, September 12, 2022
Friday, November 11, 2022
问题:XY一4型钻机卡盘与立轴如何联接?上下卡盘的应用情况怎样?...
Saturday, February 25, 2023
Thursday, September 15, 2022
问题:采用一定的设备工具,在钻孔内测试岩土性质的方法叫钻孔()。...
Monday, September 12, 2022
问题:三角带按其截面尺寸从小到大分为()型号。A、五种B、六利C、七种...
Friday, December 22, 2023
Saturday, March 30, 2024
问题:YG8C和YG8比较,提高了硬质合金的()。A、硬度B、韧性C、耐磨性...
Monday, July 3, 2023
Monday, September 12, 2022
问题:煤层及矸石堆自燃监测研究属于()。A、原始地质环境调查B、矿区水土污染地质调查C、矿区大气污染地质调查D、其它环境问题地质调查...
Friday, November 11, 2022
问题:钻进时发现煤岩松软、片帮、来压或在钻孔中水压和水量突然增大及有顶...
Monday, September 12, 2022
Thursday, September 15, 2022
Monday, September 12, 2022
Monday, September 12, 2022
问题:为了增强钻具的导向性和稳定性,要求钻具结构符合“长、刚、粗、重、...
Thursday, September 15, 2022
Sunday, April 7, 2024
问题:作为矿井设计依据的地质报告是()。A、普查报告B、详查报告C、精查报告D、细查报告...
Sunday, April 7, 2024
Monday, September 12, 2022