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Archivio TRADERE
to safeguard the know-how of Travertine stone workers
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TOOLS Tools -> Derrick crane - records: 7 Pyramidal metal tower to support and operate the equipment for drilling mining. As the derrick crane still connected at the base by pillars, there are two main types of derrick: - derrick whose column is anchored to the ground by steel trusses. - derrick whose column is anchored to the ground by cables. |
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Record(s) found: 7.
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