Sunday, April 7, 2024
问题:润滑油具有润滑,密封,减振,卸荷和防锈等作用,不具有冷却冷却作用。...
Tuesday, March 19, 2024
Thursday, March 21, 2024
Monday, February 12, 2024
问题:同一种原油的馏份油,馏份越窄,含地蜡越少,油收率越高。...
Tuesday, March 19, 2024
Monday, January 22, 2024
Sunday, April 7, 2024
Monday, January 22, 2024
问题:加热炉进料量变化对加热炉操作有何影响?如何处理?...
Wednesday, November 22, 2023
问题:管壳式换热器在使时,冷热流体的流向是如何选择的?...
Monday, February 19, 2024
问题:润滑油具有润滑,密封,减振,卸荷和防锈等作用,不具有冷却冷却作用。...
Tuesday, March 19, 2024
Sunday, April 7, 2024
Tuesday, March 19, 2024
问题:加热炉进料量变化对加热炉操作有何影响?如何处理?...
Sunday, April 7, 2024
Tuesday, March 19, 2024
Thursday, March 21, 2024
问题:原料分析一般包括()。A、比重B、粘度C、馏分范围D、比色E、水份F、闪点...
Thursday, March 21, 2024
问题:泵房着火时,首先应()。A、报警B、自己先灭火C、停止机器运行...
Sunday, April 7, 2024
Friday, October 13, 2023
Thursday, March 21, 2024