Handbook of construction plant, its cost and efficiency (1918)
Dana, Richard Turner, 1876-1928 · New York, McGraw-Hill book company, inc., [etc., etc.] · leaf 416
Fig. 176. 20-inch Davis Upriglit Drill. … Fig. 177. Merriman Standard Bolt Cutter. Size No. 2= 11/2-inch Plain Machine. 412 MACHINE TOOLS 413 bolts or tap nuts %-in. to li^-in. right or left hand, weighs1,200 lbs. and can be bought second-hand for $175 net. A single end-punch or shear weighs about 4,500 lbs. and willpunch 1-in. hole…
Contractors' operations · Building
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