The vacuum system of the wet end of a papermachine could be a centralized system or some individual systems for the vacuum points.
造纸机湿段真空系统可以是:总
真空系统或各真空点
真空系统。
The vacuum system of the wet end of a papermachine could be a centralized system or some individual systems for the vacuum points.
造纸机湿段真空系统可以是:总真空系统或各真空点真空系统。
明：以上例
、词
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