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A rock bolt anchor having concurrent chemical and mechanical...

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A rock bolt and an anchoring device

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A rock bolt and method of installing a rock bolt

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A rock bolt assembly

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A rock stabilizing apparatus

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A self centering cable bolt

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A tensioning device

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A tunnel waterproofing construction method

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A tunnel waterproofing method

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A versatile grout bag type of underground support

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A yielding rock bolt

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A yielding rock bolt

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Adapter for a self-drilling, chemically anchorable fastening...

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Adhesive anchor

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Adjustable bucket for an earth boring machine

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Adjustable height mine roadway support stilt

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Advance of pipe elements in the ground

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Advancing device for boring sections of roadway, tunnels or...

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Advancing support device for coal and ore extraction works

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An anchor bolt assembly

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