... drip set is optional. 2,Vacuum PluggingB---After filling, the syringe is delivered to the vacuum chamber manually. When the vacuum ... –vacuum sucking- nitrogen flush, then plug the stopper inside the syringe .The vacuum degree can be displayed digitally, and adjustable according ... contact with the produce shall be food grade quality. 8, Print-out of process parameters, original data is stored. 9,Nitrogen ...