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We are offering yt28 rock drill. Type yt28 weight 26 (kg) length 661 (mm) cylinder dia φ80 (mm) piston stroke 60 (mm) working pressure 0.4~0.5 (mpa) impact energy ≥60.2 (j) impact frequency ≥37 (hz) air consumption ≤81 (l/s) working water pressure 0.2~0.3 (mpa) air pipe inner dia φ25 (mm) water pipe inner dia φ13 (mm) rock drill hole dia φ34~φ42 (mm) rock drill hole depth 5 (m) shank size 22×108 (mm) rotary speed of rock drill 45
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