Of a rotary vane vacuum pump, or a liquid ring vacuum pump.

其前级泵可用滑阀泵或旋片泵 、 水环泵、油环泵等真空泵.

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The SIHI liquid ring vacuum pumps LEM are single - stage ones.

SIHILEM系列液环式真空泵是 单级 泵.

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It needs lower consumption of power and water than liquid ring pump.

与水环泵相比,具有极高的节能节水效果.

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The operating principles, process and application of liquid - ring vacuum pump in crude - oil distillation unit were introduced.

介绍了液环真空泵工作原理 、 流程及应用情况.

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