Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 23-12
... temp of adjacent mine walls . A con- tinued lower or higher temp of air current , even if rapid , modifies that of the walls only a few degrees , to a max of about 10 ° F. Seasonal changes of temp affect the temp of the strata for a ...
... temp of adjacent mine walls . A con- tinued lower or higher temp of air current , even if rapid , modifies that of the walls only a few degrees , to a max of about 10 ° F. Seasonal changes of temp affect the temp of the strata for a ...
Halaman 23-13
... temp of the air was 45 ° F , and at 3 800 ft 50 ° , or within 5 ° of the temp of the return current ( Sec 14 ) . Seasonal temperatures have little affect on the temp in large mines . Tests lasting 1 year , in 20 Illinois collieries ...
... temp of the air was 45 ° F , and at 3 800 ft 50 ° , or within 5 ° of the temp of the return current ( Sec 14 ) . Seasonal temperatures have little affect on the temp in large mines . Tests lasting 1 year , in 20 Illinois collieries ...
Halaman 23-16
... temp and high humidity within certain limits of temp . Either condition alone is bearable , but when combined , discomfort or injury to health results . At moderate temp , say under 70 ° F , relative humidity up to 100 % is ...
... temp and high humidity within certain limits of temp . Either condition alone is bearable , but when combined , discomfort or injury to health results . At moderate temp , say under 70 ° F , relative humidity up to 100 % is ...
Isi
COMPRESSED AIR PRACTICE | 15-2 |
Appli | 15-15 |
Hydraulic Compressors | 15-22 |
Hak Cipta | |
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