Vacuum vessel seal structure used in the leak test of a liquid rocket engine turbopump is discussed. 论述了某型号液体火箭发动机涡轮泵高压低温静密封检漏试验用真空室密封结构的设计问题。
The advances in low temperature rheology of engine lubricating oils are illustrated,including some involved problems at present. 简述了发动机润滑油低温流变学的进展情况，以及目前遇到的一些问题。
