With the advent of practical steam power, fans could finally be used for ventilation. In 1837 William Fourness of England installed a steam-driven fan at Leeds. In 1849 a 6 m radius steam driven fan, designed by William Brunton, was made operational in the Gelly Gaer Colliery of South Wales. [Wiki]
Gangbang with Angel Megumi, Shino Yui Kawagoe, and Maria Ono
Maria Doroshina.
Now, witness the power of this fully operational battle station.