The pump features a variable discharge port design which adjusts automatically to the internal compression ratio of the vacuum pump resulting in maximum efficiency throughout the vacuum range.

我们公司生产的液环真空泵，具有不同的出料口，自动调节内部压缩率，已达到最大的真空效率。

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And they themselves are more attention to eliminate internal management, improve the burden of output ratio, reduce costs and improve the overall efficiency.

而他们自身则更多地关注消除内部管理的负担、提高产出比、降低成本和提高整体效率的方面。

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The proposal of increasingcompression ratio without essential increase in temp. and pressure makes it possible to raise the efficiency of internal combustion engine.

提出了在几乎不增大温度和压强的前提下，增大压缩比，使提高内燃机效率成为可能。

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The key to thermal efficiency for internal combustion engines is compression ratio.

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