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3kg 4kg 6kg 10K Widely-Used Powder Vacuum Dryer Tabletop Laboratory Freeze Dryer Drying Machine, Find Details and Price about Laboratory Instrument Centrifuge Vacuum Freeze Dryer Machine from 3kg 4kg 6kg 10K Widely-Used Powder Vacuum Dryer Tabletop Laboratory Freeze Dryer Drying Machine - Okay Energy Equipment Co., Ltd.