ホーム > Term: back entry
back entry
The air course parallel to and below an entry or the entry used for secondary purposes in two-entry system of mining. Locally, any entry not having track in it.
- 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
0
作成者
- ed.young
-
(V.I.P) 21084 ポイント - 100% positive feedback
(Milwaukee, United States)
