LS series wet roots vacuum pump is a rough vacuum pumping equipment.

LS型直排大气湿式罗茨真空泵属粗真空获得设备.

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W , WY series of reciprocating vacuum pumps are the effective equipments to obtain rough vacuum.

WY系列往复真空泵式获得粗真空的主要设备.

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Is mainly used in the process of rough vacuum and large pumping quantity.

主要用于粗真空.抽气量大的工艺过程中.

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