Last Updated
：2025/12/05
drop lock
（ plural ）
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A kind of lock by which a short length of canal can be temporarily lowered while a boat passes under an obstruction such as a low bridge.
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drop lock
When the barge approached the low bridge, the crew operated the drop lock so they could pass through without dismantling the mast.
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When the barge approached the low bridge, the crew operated the drop lock so they could pass through without dismantling the mast.
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