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How do Canal Locks Work? Guide to the History of Locks : European Waterways
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Erie Canalway National Heritage Corridor :: Tips for Boating Through a Lock
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How does a lock work - Saint-Ours Canal National Historic Site
File:How Canal and River Locks Work (14121059490).jpg - Wikimedia Commons
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Kids go boating how a lock works - Canal Cruising
How Do Canal Locks Work? | ABC Boat Hire
Lock (water navigation) - Wikipedia
Houston Maritime Injury Lawyers -- How Do Canal Locks Work? | Morrow & Sheppard LLP
