纯生啤酒是指不经过巴氏灭菌或高温瞬时灭菌，而采用膜过滤除菌，达到一定的生物稳定性的啤酒。
Draft beer refers to the one with certain biological stability, which adopts the method of physical filter with no Pasteurization or instant high temperature sterilization.
成熟的啤酒经过滤，便会变得金黄通透。
The fully mature beer is filtered to produce a rich, golden-coloured beer.
本系统主要用于啤酒经过滤后再通过PVPP稳定处理，从而有效地延长啤酒的保存期。
This system applies to PVPP stabilization treatment after beer filtration, thus to prolong the effective storage period of the beer.
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