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We are offering y20ly rock drill. Type y20ly weight 18 (kg) length 609 (mm) cylinder dia φ60 (mm) piston stroke 50 (mm) working pressure 0.4~0.5 (mpa) impact energy 32.7 (j) impact frequency ≥30 (hz) air consumption ≤25 (l/s) working water pressure 0.2~0.3 (mpa) air pipe inner dia φ16 or φ19 (mm) water pipe inner dia φ8 (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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