Hasil 1-3 dari 74
SAFETY LAMPS Purposes : ( a ) in gaseous mines to provide means of illumination which , properly used , will not ignite ... The behavior of a safety lamp in a firedamp mixture depends chiefly on its arrangement of air inlets and of ...
Some Wolf lamps for mine officials have special devices to measure the height of CH , “ cap . ... Safety Lamps Name Oil used Air entering with reference to flame Combustion chimney No of gauzes Bonnet orig'l lamp Candle power ( 6 ) .
ELECTRIC LAMPS AND LIGHTS Miners ' electric lamps for gaseous mines were introduced about 1895 in Belgium . ... In the US , mine lamp makers report that there are in use ( 1938 ) 379 867 elec caplamps ( about 80 % with alkaline ...
Apa yang dikatakan orang - Tulis resensi
LibraryThing ReviewUlasan Pengguna - wackyvorlon - LibraryThing
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
35 bagian lainnya tidak diperlihatkan