Date Image Innovation Society
1952 Ditch Witch DWP Service-Line Trencher Ditch Witch DWP Service-Line Trencher ASME
1924 Bay City Walking Dredge Bay City Walking Dredge ASME
1905 Pit-Cast Jib Crane Pit-Cast Jib Crane ASME
1902 Buckeye Steam Traction Ditcher ASME

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