Time lapse sequence of a locking in Anderten lock (located at Hannover, Germany). The real time shown in this video was approx. 35 min.
Christian A. Schröder (<a href="//commons.wikimedia.org/wiki/User:ChristianSchd" title="User:ChristianSchd">ChristianSchd</a>)
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>