A Bucyrus 14-B shovel perched on timbers digs a trench from the front with long-stick shovel.Photo: Bucyrus International A Bucyrus 30C steam shovel is shown with sewer shovel attachement.Photo: ...
During the 1920s, trench digging was transformed from back-aching hand labor to mechanized continuous operation by several enterprising individuals who invented and marketed specialized trenching ...
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