(mining engineering) The holes which are shot last in mine shaft sinking.
| Sci-Tech Dictionary: back holes |
(mining engineering) The holes which are shot last in mine shaft sinking.
| 5min Related Video: back holes |
| back | |
| harmonica | |
| garlic press (culinary) |
Copyrights:
![]() | Sci-Tech Dictionary. McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved. Read more |
Mentioned in