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Lifts and moves heavy objects; lifting tackle is suspended from a pivoted boom that rotates around a vertical axis.
Keywordscrane, lifting device, instrumentality, instrumentation
Government Printing Office Official Gazette (Washingon, DC: Government Printing Office, 1912)
2400×1408, 431.3 KiB
1024×600, 74.5 KiB
640×375, 38.4 KiB
320×187, 13.1 KiB