E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 21/00 (2006.01) E21D 20/02 (2006.01)
Patent
CA 2317981
A mine roof bolt, preferably one inch or less in diameter, having an external coating configured with particles which mix resin as the mine roof bolt is rotated in a mine roof bore hole.
Jennmar Corporation
Sim & Mcburney
LandOfFree
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