4. Hydraulic and earth engineering
  5. Foundation
  6. Columnar structure

Alan G. MacKinnon

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Bottom brace for crane

Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent

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Concrete structural member splicing device

Hydraulic and earth engineering – Foundation – Columnar structure
Patent

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Pile driving assembly

Tool driving or impacting – Impacting devices – With means for rotating tool
Patent

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Profile ID: LFUS-PAI-P-1281365

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