Methods of Quarrying and Dressing
Peggy B. Perazzo, Stone Quarries and Beyond (photo caption) Plate I. "Interior view of marble quarry, West Rutland, Vermont. (See. P. 387.) Drawn from a photograph." (pp. 277) ... G. Machines and implements used in stone working 320 (1) Drills and drilling machines 320 (2) Channeling machines 321
قرأ أكثر