bn:01559695n
Noun Concept
Categories: Locks (water transport)
EN
control lock  guard lock  guard locks  tide lock
EN
A control lock, guard lock or stop lock differs from a normal canal lock in that its primary purpose is controlling variances in water level rather than raising or lowering vessels. Wikipedia
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EN
A control lock, guard lock or stop lock differs from a normal canal lock in that its primary purpose is controlling variances in water level rather than raising or lowering vessels. Wikipedia
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