홈 > Term: potstone
potstone
A large boulder or concretion having the rounded appearance of the bottom of an iron pot and easily detached from the roof of a coal seam. Compare: caldron bottom; bell.
- 품사: noun
- 분야/도메인: 광업
- 카테고리: 일반 광산; Mineral mining
- Government Agency: USBM
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- ed.young
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