The vacuum system of the wet end of a papermachine could be a centralized system or some individual systems for the vacuum points.
造纸
真
系统可以是:总的真系统或各真点独立的真系统。
The vacuum system of the wet end of a papermachine could be a centralized system or some individual systems for the vacuum points.
造纸真系统可以是:总的真系统或各真点独立的真系统。
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