홈 > Term: porthole
porthole
The opening or passageway connecting the inside of a bit or core barrel to the outside and through which the circulating medium is discharged.
- 품사: noun
- 분야/도메인: 광업
- 카테고리: 일반 광산; Mineral mining
- Government Agency: USBM
0
작성자
- ed.young
-
(V.I.P) 21084 포인트 - 100% positive feedback
(Milwaukee, United States)
