Geared irrigation lock in Weiherhammer, Bavaria.
https://s3-us-west-1.amazonaws.com/h...ation_lock.jpg
https://s3-us-west-1.amazonaws.com/h...tion_lock1.jpg
https://s3-us-west-1.amazonaws.com/h...tion_lock2.jpg
Previously:
https://www.homemadetools.net/forum/...623#post159202
https://www.homemadetools.net/forum/...987#post153090
https://www.homemadetools.net/forum/...252#post130765
https://www.homemadetools.net/forum/...154#post120977
https://www.homemadetools.net/forum/...397#post116793
