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Edf Príncipe de Dover 220m² Rua Setúbal, Boa Viagem, Recife. 81-99609.3455 Apartamento com 03 suites + 01 quarto + 02 vagas pronto para morar. . 81-99609.3455 www.instagram.com/xmetrosquadrados

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I can't really think of a reason why the piston returns to the original position!! any ideas?? I made a transparent QEV coaxial cannon out of the preform of a bottle. This was inspired by a Nighthawkinlight's project, although I added a transparent barrel and had to make everything work with a wooden piston and o-ring seal. The breech seal is just a piece of rubber from the inner tube of a bike tire. Thanks for watching!

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