Mining Engineers' Handbook, Volume 2Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 15-33
... LIGHT DRILLS FOR PLUG- AND - FEATHER WORK Light , 30-40 lb Medium , 50-60 lb Heavy , 80 lb Pile - drivers , classified by size Light , 120-130 lb DRIVERS of sheeting they will drive Heavy , 150 lb Very light , 25-40 lb Usually known as ...
... LIGHT DRILLS FOR PLUG- AND - FEATHER WORK Light , 30-40 lb Medium , 50-60 lb Heavy , 80 lb Pile - drivers , classified by size Light , 120-130 lb DRIVERS of sheeting they will drive Heavy , 150 lb Very light , 25-40 lb Usually known as ...
Halaman 42-32
... light source is less than 0.1 of the distance between source and object . Definitions . INTENSITY of light is the relative amount of luminous energy given by any source and is measured in candles or candle power . CANDLE POWER ( c p ) ...
... light source is less than 0.1 of the distance between source and object . Definitions . INTENSITY of light is the relative amount of luminous energy given by any source and is measured in candles or candle power . CANDLE POWER ( c p ) ...
Halaman 42-33
... light , an effic of 15 to 20 lumens per watt and comes in units of 300 to 500 watts . Sodium - vapor lamp is a new development , particularly adapted to highway lighting . It requires considerable auxiliary apparatus , gives a yellow light ...
... light , an effic of 15 to 20 lumens per watt and comes in units of 300 to 500 watts . Sodium - vapor lamp is a new development , particularly adapted to highway lighting . It requires considerable auxiliary apparatus , gives a yellow light ...
Isi
COMPRESSED | 15 |
Applications Definitions Data | 15-44 |
Accident Compensation Pensions | 16-1 |
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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