Numbered chains with locks, which were used to pull the miners' clothes up to the ceiling, hang in the German Mining Museum in Bochum, Germany, 21 February 2014. The museum is one
Locking In Greater Safety Measures for Underground Mining
Managing Safety On Mining Work Sites » Locksafe
Managing Safety On Mining Work Sites » Locksafe
Buy Value Packs of Kids Pixel Mining Diary | Explore Now
MASTER SAFETY LOCKOUT LOCKS SET OF 10 ( BLUE ) | Mining & Industrial Surplus