홈 > Term: medium-thickness seam
medium-thickness seam
In general, a coal seam over 2 ft (0.6 m) and up to 4 ft (1.2 m) in thickness.
- 품사: noun
- 분야/도메인: 광업
- 카테고리: 일반 광산; Mineral mining
- Government Agency: USBM
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- ed.young
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