Handbook of construction plant, its cost and efficiency (1918)
Dana, Richard Turner, 1876-1928 · New York, McGraw-Hill book company, inc., [etc., etc.] · leaf 258
nel. The following drill repair costs are given in Rock Drilling,by Dana and Saunders: The cost for putting in shape for work nine drills on theD., L. & W. cutoff was $1,100. Repairs on fourteen drills forthe first 13 months after the commencement of the workamounted to $695.62, or an average… … Fig. 87. Quiricey Mining Companys Drill Shop at Hancock, Mich.; Equipped with Four Standard Drill- . Making and Sharpening Machines. HILIImIm SHABFENINa MACHINES A drill making and sharpening machine, with a capacity forsharpening any sort of drill up to 20 feet in length and 800 to1,000 bits per…
Contractors' operations · Building
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