Hasil 1-3 dari 100
Drills are of many sizes , varying in weight and rotative and blowing power . The most effective drill for given service depends on character of the rock , depth of holes , air press available and other factors ; experience is the best ...
In VALVELESS DRILLS the piston acts as the valve . This construction is used mainly on the lighter tools , as clay spades . Rotation devices comprise : RATCHET AND RIFLE - BAR ROTATION , in which the rear end of the helical fluted rifle ...
drill assumed as 190 cu ft per min . From Table , the factor for 30 drills at 9 000 ft is 20.38 ; multiplying 190 cu ft by 20.38 gives 3 872 cu ft free air per min , which is the actual free air delivery of a compressor for the above ...
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