Diamond Drilling for Gold and Other Minerals: A Practical Handbook on the Use of Modern Diamond Core Drills in Prospecting and Exploiting Mineral-bearing Properties, Including Particulars of the Cost of Apparatus and of WorkingC. Lockwood and son, 1900 - 158 стор. |
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Diamond Drilling for Gold and Other Minerals: A Practical Handbook on the ... George Alfred Denny Попередній перегляд недоступний - 2017 |
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alluvium angle apparatus auriferous average banket borehole boring boxed with couplings Bullock carat carbons chuck clamp CLINOSTAT cloth coal connection core-barrel core-lifter corundum cost Crown 8vo cutting CYANIDE PROCESS cylinder depth derrick Diabase diameter diamond drill drill-rods drill-runner drilling-bit drive-rod drum duplex pump engine equipment extra feed machine feed-gear feed-screw feet deep feet per week fissure fitted frame gear GOLD h.p. boiler HAND DRILL hard rock hardness hoisting hoisting-plug hole hydraulic feed Illustrations Kafirs Klerksdorp length lower magnet METALLIFEROUS METALLURGY MINERAL Mining oil-can operation outfit pair patent pipe piston positive feed pressure Price prospecting pyrites quartz reamer reaming reef rock rods rope safety-clamp screw seam shaft shipping weights South Africa stand-pipe steam stones strata strike surface swivel swivel-head threaded thrust tion Transvaal tube underground valves vertical water-swivel Weight of drill weights and dimensions wheels whilst wire wire rope