Saturday, July 1, 2023
Monday, April 8, 2024
问题:下列润滑剂中,属于液体润滑剂的是()。A、钾基脂润滑油B、有机润滑油C、石墨D、二硫化钼...
Monday, January 2, 2023
问题:设备的规划是选型合理会使设备的寿命周期费用最小。...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:离心泵在启动前,先向泵体内灌充过半以上被输送的液体。...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:水冷壁单根管向炉内突出的外鼓值超过()者,应拉回复位。...
Thursday, September 21, 2023
Friday, November 3, 2023
问题:润滑剂能降低磨损,减少动力消耗,提高机械设备的效率。...
Tuesday, January 10, 2023
Tuesday, September 13, 2022
问题:为什么在工作中要常检查拧紧螺纹,以保证正确的预紧?...
Tuesday, June 13, 2023
问题:下列材料的牌号中属于碳素结构钢的是()。A、45B、Q215C、30MnD、T13E、Q235F、Q390G、ZG270-500...
Sunday, October 22, 2023
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:停电操作应在断路器断开后进行,其顺序为()A、先拉线路侧刀闸,后拉母线侧刀闸B、先拉母线侧刀闸,后拉线路侧刀闸C、先拉哪一侧刀闸不要求D、视情况而定...
Monday, March 13, 2023
Tuesday, September 13, 2022
Tuesday, September 13, 2022