ホーム > Term: Raky boring method
Raky boring method
A method of boring somewhat similar to Fauck's. Hollow steel rods 2 in (5.08 cm) in diameter are used with a mud flush. A walking beam, fitted with steel springs, imparts from 80 to 120 short blows/min to the chisel.
- 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)
