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What are the uses of an electric can opener?

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They are used to open cans.
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What uses more electricity - keeping a fridge door open for a while or constantly opening and closing it during this time?

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What electric can openers are made in US?

A number of electric can openers are made in the US including the EZ-DUZ-IT and, for heavier duty work, the Edlund 266 (see Sources and related links section below). ANSWER 2

What is the use of electric can opener?

An electric can opener opens cans. It  is good for those who have problems opening cans with manual can  openers.