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Diaphone Jim · 03-07-2019, 11:12 AM

That small area of steel-on-steel contact is what reduces friction to the point that allows millions of tons to roll along efficiently.

03-07-2019, 11:12 AM	#348
Diaphone Jim Junior Master Dwellar Join Date: Sep 2007 Location: Northern California Posts: 2,122	That small area of steel-on-steel contact is what reduces friction to the point that allows millions of tons to roll along efficiently.