Back holes

From WebRef.org
Revision as of 15:16, 3 November 2020 by Webref (talk | contribs) (Created page with "In shaft sinking, raising, or drifting, the holes that are shot last. Source: Dictionary of Mining, Mineral, and Related Terms")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigationJump to search Shop WOMAN X ONETEASPOON

In shaft sinking, raising, or drifting, the holes that are shot last.

Source: Dictionary of Mining, Mineral, and Related Terms


Sponsor: The Ultimate Portable Safe for Home, School, Travel, & More. Get FlexSafe Today.