Drill bits are designed for percussive rotary drilling of wells
of various purposes with diameter in rocks and ores with coefficient of hardness f=6...5 MPa.
f=6...20 on the scale of Professor Protodyakonov (GOST 21153.1-76) and can be used
for drilling operations open on drilling machines at compressed air pressure of 2.0...2.5 MPa.
أخبرنا بما تحتاجه واحصل على عروض أسعار من موردين موثوقين