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...
We sat in Lily's sunroom while I sketched in the situation.我们坐在莉莉的日光浴室里，我把目前形势的细节情况又补充说明了一下。He is the one man who could retrieve that situation.他是唯一能挽回局面的人。The Turkish situation makes the lead in tomorrow's Gua...