Thus they can provide a clean vacuum over the entire vacuum range. Dry pumps require little maintenance and don't generate any waste material.

无油真空泵提供了完全洁净的真空环境，泵体本身无需保养，而且不会产生任何污染物。

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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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Vacuum drying can be applied in a range of processes in several industries, including chemical, pharmaceutical, food, plastics, and metal powders.

真空干燥过程中可以应用在一个范围在几个行业，包括化工，制药，食品，塑料，金属粉末。

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Jet-Vac for instance was initially called Air-Hawk and had lights in his vacuum pack and was a whole range of colors before the design settled on the metallic blue look he has today.

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Of course, people who can afford vehicles in that price range can also buy any vacuum of their choice.

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