Acceleration is accompanied by a resonating growl from the gearbox.变速箱随着加速传来一阵轰鸣。Centrifugal machines are connected to the motor drive directly instead of through a gearbox.离心机不通过调速箱直接与电机驱动装置相连.We have to take the engine...
Getter - ion pumps decrease chamber pressure by chemical reaction of residual gases with an evaporated metal.吸气离子泵通过剩余气体与蒸发的金属之间的化学反应减少了内腔的压力.Recent electronic means of pumping using low temperature sorption techniques a...