عنوان: SHOVELS تعداد اسلاید: 17 ...................................... SHOVELS: William S. Otis, of the firm of Carmichael, Fairbanks and Otis, when living in Canton, Massachusetts in 1834 and 1835, while his firm was performing grading work for the Boston & Providence Railroad built the first steam excavator – a steam shovel. | ![]() |