Sunday, September 11, 2022
测量圆柱工件长度,其公差在±0.05,最常用的量具为()。A、钢板尺B、千分尺C、游标卡尺D、钢卷尺...
Sunday, May 14, 2023
冬季冻煤层厚度为()时,抓斗落放的冲击力可以击碎冻煤层。A、100mmB、200mmC、300mmD、400mm...
Thursday, September 14, 2023
Sunday, February 11, 2024
Thursday, December 14, 2023
Monday, October 31, 2022
Tuesday, January 3, 2023
轴向柱塞泵蝶形弹簧的紧力要求压缩弹簧()。A、0.9~1mmB、0.8~0.9mmC、0.5~0.6mmD、0.3~0.4mm...
Sunday, February 11, 2024
Sunday, February 11, 2024
斗轮堆取料机液压油系统安装后,其严密性试验的试验压力为工作压力的...
Sunday, September 11, 2022
Sunday, February 11, 2024
润滑是减少和控制()。A、发热B、传动C、噪声D、摩擦...
Wednesday, March 15, 2023
两齿轮啮合运动,Z1=30、Z2=10,若ω1=57rad/s,则ω2为()rad/s。A、171B、10C、38D、5...
Friday, May 10, 2024
Friday, May 10, 2024
()传动具有自锁性。A、链B、齿轮C、蜗轮、蜗杆D、键...
Saturday, July 29, 2023
Sunday, December 18, 2022
液压缸检修中活塞杆的弯曲度应小于0.03/500,主要工作面其粗糙度在0.4以上。...
Thursday, November 10, 2022
Sunday, September 11, 2022
在检修中,装配径向柱塞马达时,涨圈不得有损伤及棱角,两涨圈开口位...
Sunday, September 11, 2022
Monday, October 24, 2022