问题:对于在易燃、易爆、易灼烧及有静电发生的场所作业的工人,可以发放和...
Tuesday, September 13, 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
Saturday, September 17, 2022
Friday, September 16, 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
问题:轮胎式集装箱龙门起重机的常见故障中,柴油机无高速的原因有:‖怠速...
Monday, September 12, 2022
问题:若干电阻串联时,其中阻值越小的电阻,通过的电流也越小。...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:在液压传动中,当油液流经无分支管道时,每一横截面上通过的流量一定...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Thursday, September 15, 2022
Friday, September 16, 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
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:当机件具有对称平面时,在垂直于对称平面的投影面上的投影,可以对称...
Tuesday, September 13, 2022
Friday, September 16, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Friday, September 16, 2022