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19/01/2021· این فشار و نيروي مکانیکی توسط دو فک سنگ شکن به وجود مي آيد که یکی ثابت مي ماند در حالی که دیگری متحرک است. سنگ شکن فکي که گاهي اوقات با نام سنگ شکن ضامن دار نيز شناخته مي شود، شامل مجموعه ای از فک های عمودی مي باشد. در يک سنگ شکن یکي از فک ها ثابت نگه داشته می شود که به آن فک ثابت گفته می شود در حالی که فک ديگري را فک متحرک مي نامند.
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1- سنگهای قیمتی این گروه سنگهایی می باشند که به علت سختی و کمیاب بودنشان ارزش خیلی بالایی دارند و در مقایسه با گروه سنگهای نیمه قیمتی بسیار گران تر می باشند. به طور کلی نوع با کیفیت سنگهای الماس، زمرد سبز، یاقوت سرخ، یاقوت کبود و یا هرگونه کانی کمیابی به عنوان سنگهای قیمتی در صنعت جواهرات معروف می باشند. ٢- سنگ های نیمه قیمتی
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یک پیام ارسال کرد