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The wikipedia article has a subsection that is well explained IMO: http://en.wikipedia.org/wiki/Pop_pop_boat#Principle_of_operation http://en.wikipedia.org/wik
by guillaume_a 15y ago
The wikipedia article has a subsection that is well explained IMO:
http://en.wikipedia.org/wiki/Pop_pop_boat#Principle_of_operation http://en.wikipedia.org/wiki/Pop_pop_boat#Principle_of_opera...