Tob tashlash (qayishish, qiyshayish)

Tob tashlash (qayishish, qiyshayish) – metallning notekis isishi yoki sovishi, deformatsiyasi yoki fazaviy o’zgarishlari natijasida yuzaga keladigan icchki kuchlanishlar ta’sirida mahsulot shaklining buzilishi. Masalan: yog’ochning tob tashlashi.

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