The vacuum system of the wet end of a papermachine could be a centralized system or some individual systems for the vacuum points.
造纸机湿段真
系
是:总的真系或各真点独立的真系。
The vacuum system of the wet end of a papermachine could be a centralized system or some individual systems for the vacuum points.
造纸机湿段真系是:总的真系或各真点独立的真系。
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