http://psilogic.livejournal.com/ ([identity profile] psilogic.livejournal.com) wrote in [personal profile] donmigel_62 2014-02-18 08:16 am (UTC)

Хорошая идея: если бы дырка такой ширины уходила на такую глубину, она бы отрезала головку. А так - сужение вглубь.позволяет увеличить поверхность и снизить вероятность сминания и среза.
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