Oosterschelde stormflood barrier is with its 9 kilometres length the largest stormflood barrier in the world protecting The Netherlands from the sea. It has been built after the big flooding disaster in 1953 that took the life of 1836 humans. After winning the land...
In an African mine they built a safety door about 500 metres below surface to protect the below part from water intrusion. The door, 5 x 5 metres in square needs to close in case of an emergency. To seal this door, 3 inflatable seals are used, activated with max. 50...
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