... very early warning system 甚早期报警体系 very high vacuum 极高真空 very large scale integrated circuit 年夜局限集成电路 ...
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very-high vacuum 甚高真空
The advantage of vacuum deposition is that it's possible to make very high-quality films, which result in materials with higher conductivity.
真空沉积法的优势在于它可以制出高品质的薄膜，从而成为高导电性的材料。
As the Roots pump is a non-vacuum inside the compression, the compression ratio is usually very low, so high, medium and vacuum pumps need to pump before.
由于罗茨泵是一种无内压缩的真空泵，通常压缩比很低，故高、中真空泵需要前级泵。
Dry running linear diaphragm pumps. Two means of actuation: linear and vibrating armature. Very high life time, low noise level and high efficiency. Used as compressors and vacuum pumps.
空运行线性隔膜泵。两种气动方法：线性和振动电枢。具有很高的使用寿命，低的噪音和高性能。可用作压缩机和真空泵。
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