问题:Z3040对摇臂导轨、主轴、主轴套以及内外主柱的滚柱场作轨道,均作了()处理,以延长机床寿命。A、正火B、淬火C、调质...
Friday, May 12, 2023
Sunday, September 11, 2022
Saturday, February 11, 2023
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问题:泥包卡钻和缩径卡钻初期,要尽量大排量循环,轻提猛放,转动钻具,采...
Sunday, September 11, 2022
问题:用硬质合金钻头回转钻进中硬及中硬以下岩石时()A、应以高转速为主;B、应以高钻压为主。...
Tuesday, March 28, 2023
问题:钻相交斜深孔用麻花钻头钻头不能(),钻头刀刃、角度要对称,钻交叉...
Thursday, September 15, 2022
问题:钻井液滤失量过高会使钻井液密度(),进而降低钻速。...
Thursday, September 15, 2022
问题:摩擦离合器的作用是接通或切断动力,实现过载保护。...
Thursday, August 24, 2023
问题:主轴()精度误差包括主轴径向跳动、轴向跳动和角向摆动三种误差。A、回转B、几何C、尺寸D、位置...
Saturday, April 15, 2023
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:卡钻事故处理常用窜打、振;烧钻事故处理常用冲、拉、顶。...
Thursday, April 25, 2024
问题:用加工中心加工箱体孔系使用()简单、数量少、生产准备周期短。...
Sunday, September 11, 2022
问题:在一定切削用量的条件下,选用合适的()进行充分冷却能提高钻头耐用...
Thursday, September 15, 2022
问题:灰铸铁材质零件镗孔精镗刀的材质应选用钨钴类硬质合金中硬度较高的()牌号。A、YT5B、YT30C、YG8D、YG3...
Saturday, March 2, 2024
Sunday, September 11, 2022
问题:()代号应注在可见轮廓线、尺寸线、尺寸界线或它们的延长线上。A、热处理B、公差配合C、形位公差D、表面粗糙度...
Sunday, October 1, 2023
Thursday, September 15, 2022
Monday, February 27, 2023