7mm Pit Props for Graig Wen Colliery.

michael080

Western Thunderer
I'll bet there'll be a good lacing of heavy metals and hydraulic fluid in there as well.

you're defintely right with the heavy metals, but mineral oil based hydraulic fluids would be far too dangerous in mines. As far as I know, these folks always used non-flamable hydraulic fluids, mostly water based. Not exactly healthy mixxtures though.

Michael
 
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