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which of the following is not a food preservation technique which of the following is not a food preservation method which of these is not a food preservation technique which of the following is classed as a food preservation technique which of the following food preservation techniques used vinegar which of the following is not a correct method of food preservation which of the following is not a physical method of food preservation which of the following is not a process of preserving food which one of the following is not a method of food preservation salting drying boiling pickling what are the techniques of food preservation
