홈 > Term: Banka drill
Banka drill
A portable, manually operated system used in prospecting alluvial deposits to depths of 50 ft (15.2 m) or more. Also known as an Empire drill.
- 품사: noun
- 분야/도메인: 광업
- 카테고리: 일반 광산; Mineral mining
- Government Agency: USBM
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- ed.young
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(Milwaukee, United States)
