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Fires from this cause in the Penn anthracite region have cost vast sums . It is a source of danger in outcrops of coal beds ... LIGHTNING ca using fire in wood structures at top of shaft , in timber lining , or at bottom of shaft .
If the fire still makes headway or , in case of a gob fire , is not approachable because of roof falls , it must be inclosed by stoppings . In presence of gas , as closing by stoppings is dangerous , the last stopping which shuts off ...
Also , in fighting fires , the presence of CO in the return air indicates an active fire , as otherwise CO is rapidly diffused and absorbed by moisture . First - aid - to - the - injured packets and boxes , including simple medical ...
Apa yang dikatakan orang - Tulis resensi
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I only have the second volume of this work, and I love it! Found at a local Value Village, it is filled with fascinating information. Details of all aspects of mine engineering, including compressed air, ventilation, and supporting structures. Baca ulasan lengkap
Conditions Methods in General
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