A group of apprentics were operating the hydraulic press.一群学徒正在开动水压机.The antiwear hydraulic oil had excellent lubricating, antioxidant, thermal stable properties.抗磨液压油具有突出的抗磨性,良好的润滑性 、 抗氧性和热安定性等特点.Hydraulic characteristi...
...emeritus professor of physics...荣誉退休的物理学教授I am to disapprove of those who defer emeritus age.我是不赞成推迟退休年龄的." Perhaps I can introduce Mr. Lake Kirby , an emeritus professor from Washington University ? "请允许我介绍华盛顿大学名誉教授 ...