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backwoodsbob

(6,001 posts)
Sat Nov 24, 2012, 02:17 PM Nov 2012

a product I designed

This one is kinda wierd.I helped design a coal mining bolt that helps save miners lives but means they can go farther and farther digging coal.

Kind of a mixed blessing.

http://www.jennmar.com/pdfs/JENNMAR_YieldLok.pdf

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a product I designed (Original Post) backwoodsbob Nov 2012 OP
I saw those things installed on a strange TV reality program about a coal mine Brother Buzz Nov 2012 #1
it's called a pinner backwoodsbob Nov 2012 #2
Especially if the operator is addicted to Oxycodone.... Brother Buzz Nov 2012 #3
yep backwoodsbob Nov 2012 #4
Wow. That's impressive! Yes, a mixed blessing, but in a good way. HopeHoops Nov 2012 #5

Brother Buzz

(39,849 posts)
1. I saw those things installed on a strange TV reality program about a coal mine
Sat Nov 24, 2012, 02:23 PM
Nov 2012

The bolts are cool, but the machine that bores the holes and installs them was what really held my interest.

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