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Subject
- Beckman Instruments, Inc.2
- Food--Preservation2
- Food--Storage2
- Plastic films2
- Scientific apparatus and instruments2
- Beckman, Arnold O.1
- Dinners and dining1
- E.I. du Pont de Nemours & Company1
- Employees1
- Food industry and trade1
- Hydrogen-ion concentration--Measurement--Instruments1
- Plastics industry and trade1
- Polyethylene1
- Polymers1
- Samples (Commerce)1