not rocket science

Mar. 12th, 2020 01:52 am
jayrandom: (Default)
[personal profile] jayrandom
Сегодня на детской площадке вдруг ясно разглядел сварной шов на алюминиевой горке по технологии friction stir welding.

Он был ровно такой же, как на космических кораблях и ракетах!
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