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Food--Preservation
2
Food--Storage
2
Plastic films
2
Beckman Instruments, Inc.
1
Beckman, Arnold O.
1
Dinners and dining
1
E.I. du Pont de Nemours & Company
1
Employees
1
Plastics industry and trade
1
Polyethylene
1
Polymers
1
Samples (Commerce)
1
Scientific apparatus and instruments
1
