Drill bits are designed for percussive rotary drilling of wells
of various purposes in rocks and ores with the coefficient of
f=6...20 on Professor Protodyakonov's scale (GOST 21153.1-76) and can be used for drilling works by open-cut method on the surface.
for carrying out drilling works by the open method on drilling machines at pressure of compressed air 2,0...2,5 MPa.
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