Sunday, September 11, 2022
问题:XY一5型钻机液压卡盘上的定位卡,用于保持卡瓦对称和松紧钻杆时具有良好的()。A、直线度B、圆柱度C、同轴度...
Sunday, November 6, 2022
Sunday, December 11, 2022
Monday, September 12, 2022
Thursday, September 15, 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
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
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:机台某日的平均岩心采取率是()与当日进尺的百分比。...
Monday, September 12, 2022
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
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
Sunday, April 7, 2024
问题:钻进中,若发现钻进速度不正常时应提钻检查()。A、岩芯管B、钻杆C、钻铤D、钻头...
Saturday, November 26, 2022
Thursday, September 15, 2022
问题:圆锥齿轮一般是用来传递两()轴之间的旋转运动的。...
Thursday, September 15, 2022
Thursday, September 15, 2022
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
问题:铣刀是一种多切削刃刀具,生产率较高,但切削厚度有()变化,易生产振动。...
Friday, November 11, 2022