" as well as for use with pneumatic tools. In the center of the area to be lifted, Ordinary ledges of varying thickness. a drill hole two or three inches in diameter.is sunk six or eight feet in Incinerating machine automatically depth (.according to the required thick- performs several successive… … sary movements by means of cams, the mantles be- A "Hit" bein? split and drilled into required widths and lengths. bed planes whatever. Near ing supported by rods carried on endless chains and these quarries is Stone THE "LIFTING PROCESS" IN THE QUARRYING OF GRANITE.
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