Friday, April 26, 2019

Canal lock

1969 Memories of Narrow Boat Men | BBC > . How to Narrowboat channel - Willow Wren Training > .
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Canal network - narrowboat vs widebeam access > .



Early locks were designed with a single gate, known as a flash lock or staunch lock. The earliest European references to what were clearly flash locks were in Roman times.

https://en.wikipedia.org/wiki/Flash_lock
https://en.wikipedia.org/wiki/Lock_(water_navigation)

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