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Vaqt: 2020-10-10 Xitlar : 43
Qattiqlikni sinash materialning qattiqligini aniqlash uchun ko'chma Rockwell sinov qurilmasi yordamida amalga oshirilishi mumkin.
Qattiqlikni sinash materialning qattiqligini aniqlash uchun ko'chma Rockwell sinov qurilmasi yordamida amalga oshirilishi mumkin.
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