How does the lock to lift boats in a canal work?

Subject: How does the lock to lift boats in a canal work?

Date: Fri Jan 28 23:47:49 2000
Posted by Andy
Grade level: 7-9 School: No school entered.
City: Markham State/Province: Ontario Country: Canada
Area of science: Engineering
ID: 949124869.Eg

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Re: How does the lock to lift boats in a canal work?

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