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biţi disc
Un pic cu două sau mai multe discuri de rulare care face de tăiere. Folosit în foraj rotativ prin intermediul unor formaţiuni.
- ส่วนหนึ่งของคำพูด: noun
- อุตสาหกรรม/ขอบเขต: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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