When ejectors are used for pumping this air, attention must be given to minimizing thrust losses . 当采用引射器来抽引冷却空气时,必须注意减少推力损失。
Conventional equipment such as mixing funnels, pumps, solids eductors and the like can be employed . 常用的设备,例如混合漏斗、泵、固体引射器等,都可使用。
An auxiliary ejector with as little blockage in the ducting as possible is placed behind the inlet of the diffuser duct . 一个辅助引射器,在通道中要以尽可能小的堵塞面积布置在扩压器进口之后。
Many of the difficulties just described are avoided by the use of an auxiliary ejector and an engine exhaust diffuser which are placed in tandem . 利用直列放置的发动机排气扩压器和辅助引射器,可以避免上述许多困难。
During the early nineteen-fifties a remarkable device known as the maser came into being through the efforts of a number of scientists . 在本世纪五十年代初,通过许多科学家的努力,出现了一种引人注目的器件,叫做微波激射器。