ホーム > Term: half-course
half-course
A drift or opening driven at an angle of about 45 degrees to the strike and in the plane of the seam.
- スピーチの一部 noun
- 産業/ドメイン 炭鉱
- カテゴリ 炭鉱全般; Mineral mining
- Government Agency: USBM
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作成者
- ed.young
- 100% positive feedback
(Milwaukee, United States)