abr Posted December 17, 2020 Share Posted December 17, 2020 Из какого материала сделана зубчатая поверхность ступеней старых эскалаторов? Link to comment Share on other sites More sharing options...
Никита Мишин Posted December 29, 2020 Share Posted December 29, 2020 Из волокнита. Композит из волокна и фенол-формальдегидных смол. Link to comment Share on other sites More sharing options...
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