4. F - Mech Eng,Light,Heat,Weapons
  5. 16
  6. B

Mine roof bolt installation

F - Mech Eng,Light,Heat,Weapons – 16 – B

Patent

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Details

85/2, 61/47

F16B 11/00 (2006.01) E21D 20/02 (2006.01)

Patent

CA 643864

Dempsey Joseph B.

F - Mech Eng,Light,Heat,Weapons – 16 – B
Inventor

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Dempsey Joseph B.

F - Mech Eng,Light,Heat,Weapons – 16 – B
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Na

G - Physics – 21 – G
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