Humor Magazine

How Does A Lock Work?

By Gerard @presurfer
How Does A Lock Work?
A lock is a section of a waterway, such as a canal, closed off with gates, in which vessels in transit are raised or lowered by raising or lowering the water level of that section. How does this work? Test it yourself! Just press the buttons from left to right.
(thanks Cora)The Presurfer

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