Roger M. Hansen

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Mine roof or rock bolt expansion anchor of the bail type

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Post tensionable grouted anchor assembly

Hydraulic and earth engineering – Earth treatment or control – Chemical
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Precast roof bearing block

Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
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Resin anchored rock or mine roof bolt anchor mechanism

Hydraulic and earth engineering – Earth treatment or control – Chemical
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Profile ID: LFUS-PAI-P-544604

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