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...
The Egyptians probably measured their day in twenty-four hours of unequal length.埃及人很有可能用不同长度的24小时来度量日子。The ancient Egyptians knew ways to preserve dead bodies from decay.古埃及人懂得保存尸体，使之不会腐烂的方法。Carter found himself defendi...
Hence a good absorber is a good emitter, and a poor absorber is a poor emitter.所以良吸收体就是良发射体, 劣吸收体就是劣发射体.Recently, I think after some soft shock absorber, you want to adjust.最近以来, 我认为后减震器有些软, 想调整一下.Shock absorber sliding ...