首页 > Term: well-drill hole
well-drill hole
Hole drilled by means of an apparatus known as a well drill, or similar to that, and used in groups for blasting on a comparatively large scale. Such holes are usually 5 in or 6 in (12.7 cm or 15.2 cm) in diameter and from 30 to 150 ft (9.1 to 45.7 m) deep.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
0
创建者
- ed.young
- 100% positive feedback
(Milwaukee, United States)