Active Member
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[China]
Contact name:
Changsha Adriller Machinery Co.,Ltd. |
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Taper Rod Degree 11,Effective Leng:1800mm,Carbu- Tr2211-12c
Description:
Drilling precision can be further improved by using this as the first rod in a normal drill string. Furthermore, since this is a speed rod design it will produce straighter holes and at least 10% higher penetration rate in good rock conditions compared to rod and coupling sleeve combination system.
