http://tavitoom.livejournal.com/ ([identity profile] tavitoom.livejournal.com) wrote in [personal profile] ruffe 2012-07-08 08:46 am (UTC)

я вот тут с картинками читаю:)
http://abondarcev.livejournal.com/199296.html

автор пишет:
есть затворы в конце трубы - тоннель делится на 2 трубы которые можно блокировать хоть поочереди хоть одновременно
(32 comments)

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