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How many pumps to create a good vacuum
There is not an exact number of pump to creat a good vacuum. Depending on the size of the container in the content, anywhere from 7-10 should be good.
How many pumps to create a good vacuum
There is not an exact number of pump to creat a good vacuum. Depending on the size of the container in the content, anywhere from 7-10 should be good.
