Standard configuration for rotary vane vacuum pumps.

标准配置为旋片式真空泵。

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Automatic electric systems use rotary vane electric vacuum pumps to create vacuum and an electric controller to maintain the correct vacuum level.

自动电动系统采用产生真空的旋转叶片电动真空泵和电动控制器，以保持准确的真空等级。

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