问题:以下会造成炉进料泵抽空的因素有()。A、抽出塔液面空B、液面指示失灵C、管线内发生气阻
Sunday, April 7, 2024
Sunday, April 7, 2024
Tuesday, March 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
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
Monday, January 22, 2024
Sunday, April 7, 2024
Thursday, March 21, 2024
Monday, February 19, 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
Friday, October 13, 2023
Thursday, March 21, 2024
Thursday, March 21, 2024
Wednesday, November 22, 2023
Sunday, April 7, 2024
问题:润滑油的质量指标主要有粘度,粘度指数(或粘度比),其次是凝点,残碳,酸值,水分,闪点等。
Sunday, November 26, 2023
问题:汽提塔底吹蒸汽的主要作用是()。A、加热B、降低溶剂蒸气分压C、保证塔底温度
Sunday, January 28, 2024
问题:在实际使用中,选择风开和风关阀的原则是从安全的角度来选择。
Sunday, April 7, 2024
Thursday, March 21, 2024