Tuesday, September 13, 2022
Saturday, July 15, 2023
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
问题:真空泵油是机械真空泵专用润滑油,虽然泵有着不同的类型,但对油品质...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:工具、工件、附件定置摆放,设备零部件及安全防护装置齐全,线路、管...
Tuesday, September 13, 2022
问题:焊接残余变形可分为角变形、弯曲变形、()、()、()...
Monday, June 26, 2023
Monday, April 8, 2024
问题:钙基脂润滑油属()润滑剂。A、液体B、半液体C、固体D、气体...
Saturday, November 18, 2023
Tuesday, September 13, 2022
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
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
问题:拆卸零部件时,不必预先采取安全措施(包括起重过程)。...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
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
Friday, November 3, 2023
Tuesday, September 13, 2022
Tuesday, September 13, 2022