Home > Term: watchmen
watchmen
Weak coal pillars left in workings to give warning of an impending collapse.
- Besedna vrsta: noun
- Industrija/področje: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- ed.young
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(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
