Tuesday, September 13, 2022
问题:对于工字钢、H钢等悬挂型轨道,支撑车轮的轨道踏面磨损量达原尺寸的...
Saturday, September 17, 2022
Friday, September 16, 2022
问题:把名义中心距不等于()中心距的变位齿轮副称为角变位圆柱齿轮副。...
Saturday, September 17, 2022
问题:岸桥司机室不电气房之间的通讯是通过()将PROFIBUS信号不先...
Friday, September 16, 2022
问题:零件某个部件所承受的实际应力大于材料的屈服强度时发生塑性变形,而...
Monday, September 12, 2022
问题:现有一批孔轴零件的配合代号如下:φ30F8/h7,Φ30H7/j...
Tuesday, September 13, 2022
Thursday, September 15, 2022
Tuesday, September 13, 2022
问题:()表示油液运动时会在流层之间产生内部摩擦阻力的性质...
Tuesday, September 13, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
问题:链斗船小车轮直径大于400㎜,大修后表面淬火层厚不小于()㎜。...
Tuesday, September 13, 2022
问题:在选矿作业中,最常用的选矿方法有()法、磁选法和重选法三种。...
Friday, September 16, 2022
Friday, September 16, 2022
问题:FQ16-30型起重机中”FQ”代表浮式起重机。...
Monday, September 12, 2022
Tuesday, September 13, 2022
问题:为防止人身触电的伤害,漏电开关动作电流与动作时间的乘积不应超过(...
Tuesday, September 13, 2022
Friday, September 16, 2022
Tuesday, September 13, 2022