홈 > Term: drop sheet
drop sheet
N. of Eng. A door, made of canvas, by which the ventilating current is regulated and directed through the workings.
- 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)
