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voor de liefhebbers van educatieve powerpoints ;)

en op aanvraag van talrijke jufjes :)

The Submarines History
by Jay Lee Brian

Submarines are ships that can operate both under and on top of the water.
One of the first submersible vessels was built around 1620 by a Dutchman named Cornelius van Drebbel.
Submarines have changed a lot since Drebbel's day. Today some submarines are 200 metres long and carry a crew of over 150. Nuclear powered submarines can stay underwater for months at a time...

Een korte geschiedenis van de duikboten in 6 pagina's ppt.

Dank aan Kaleu :)