Today, cans are sealed with a roller. A seaming head pushes the lid from
above while a another roller on the side curls the edge of the lid
around the edge of the can. You can simply rub the can against the
concrete to thin the metal out. The friction cuts through the top, which
makes it easier for you to open the can. Below you can see this
demonstrated in a video.
The edge of the can will be sharp – so please take caution. -
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By Natural Cures Not Medicine
