Concrete-cement Age
As a practicing civil engineer, his experience has brought him into close touch with excavators used in tunnel and subway ... These notes were compiled a few years ago for classroom use and recently elaborated by a study of existing records and ... Scrapers The book opens with a discussion of drag and wheel scrapers, which are well known and highly efficient tools for ... On account of the small initial cost and low maintenance cost of this excavator, it could be economically used inanbsp;...
| Title | : | Concrete-cement Age |
| Author | : | Allen Brett, Harvey Whipple |
| Publisher | : | - 1913 |
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