4. Traversing hoists
  5. Having vertically swinging boom
  6. Having means to swing boom vertically

James P. Piper

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Boom point construction

Traversing hoists – Having vertically swinging boom – Having means to swing boom vertically
Patent

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Tubular drill mast

Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Three-dimensional space-defining
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Profile ID: LFUS-PAI-P-260318

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