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by josefx 3361 days ago
Also when they are properly maintained. You don't want to be the maintenance guy getting killed by the combination of high water pressure and a 1cm wide opening.
1 comments
josefx 3361 days ago
Here an actuall video on the topic: https://www.youtube.com/watch?v=AEtbFm_CjE0 . It is the pressure difference that results on a large force on any unlucky diver.
link