Mining Engineers' Handbook, Volume 2Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Hasil 1-3 dari 94
Halaman 16-6
... ground , or to bury copper ground- plates . Galvanized iron pipes , 0.75 to 1 - in diam , driven 6 to 8 ft in earth , will have 15 to 20 ohms resistance . Where good grounds can not be obtained for a considerable distance , larger and ...
... ground , or to bury copper ground- plates . Galvanized iron pipes , 0.75 to 1 - in diam , driven 6 to 8 ft in earth , will have 15 to 20 ohms resistance . Where good grounds can not be obtained for a considerable distance , larger and ...
Halaman 17-52
... ground white cheesecloth about a yard wide in form of crosses or circles , so located in open spaces that they will show clearly on the photographs . These cheesecloth stations can be joined to the ground control either before or after ...
... ground white cheesecloth about a yard wide in form of crosses or circles , so located in open spaces that they will show clearly on the photographs . These cheesecloth stations can be joined to the ground control either before or after ...
Halaman 23-38
... ground Lead and zinc ( Missis- sippi Valley ) . 190 5924 626 178 6728 1 032 684 123 013 36 704 1 192 401 7.99 8.09 ... ground cut ground Open- cut Total cut Surface Open- Total cut Copper . 94 6 203 2355 1630 10 188 1 700 447 622 248 464 ...
... ground Lead and zinc ( Missis- sippi Valley ) . 190 5924 626 178 6728 1 032 684 123 013 36 704 1 192 401 7.99 8.09 ... ground cut ground Open- cut Total cut Surface Open- Total cut Copper . 94 6 203 2355 1630 10 188 1 700 447 622 248 464 ...
Isi
COMPRESSED | 15 |
Applications Definitions Data | 15-44 |
Accident Compensation Pensions | 16-1 |
Hak Cipta | |
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adjustment Aerial Tramway anthracite approx assay aver borax buckets Bur Mines capac carriers cars charge chute claim coal mines compressor concentrate conveyer copper cost crusher crushing cu ft cupel cyanide deflection diam discharge distance drill dust elev engineer explosions feed filter fire firedamp gold hoisting horiz intercooler labor lamp less litharge loaders loading lode long ton machine material mechanical metal method mill mineral motor operation pipe plant plate plumb-bob pump pyrite rock safety lamps sample screen shaft sheave short ton side silver sizes Sodium carbonate solution speed station steel stopes surface survey Table tape telescope temp tension tests timber tion tons Total towers track cable traction rope tramway Trans transit traverse underground usually vein vertical wire zinc