Handbook of construction plant, its cost and efficiency (1914)
Dana, Richard Turner, 1876-1928 · Chicago, The M. C. Clark Publishing Co. · leaf 319
B^OOOSNIC >oooooooooooo <OMMCOC q»NMeq«q«OONHNINO001CO 00 soeocococe 4XXXXXXXXXXXXXXXX X xxxxxxxxx tC00C0C<100«DTt<C000CqOC0O000300 <M eoocoocotococoeo >cqooc*ioo X x xx: CM-*O0tH-*iHt-IC ig «JMOQHfaOW>-^Wt-]§ZOkG> p* WtHp>^XfHN^^: .&S£& t^S cS 3 oJ 314 HANDBOOK… … Fig. 123. Tower Drag-Scraper Excavator. stationary, they slide on other cables stretched parallel to theditch and fastened to deadmen, thus giving stability to the tower,while allowing it to move parallel to the ditch; the scraper
Contractors' operations · Building
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