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Измерение твердости вала с трапецеидальной резьбой Tr60x8. Материал заготовки 20х13. Закалка до HRC , с отпуском до HRC . Вал запчасть (шпиндель) для задвижек трубопровода. Приводной механизм закрытия задвижки. Shaft hardness measurement with trapezoidal thread Tr60x8. Workpiece material 20x13. Hardening up to HRC , tempering up to HRC . Shaft spare part (spindle) for pipeline valves. The drive mechanism for closing the valve.

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