HA117 Aug. 31, 2011 5:05:31
1, TCI tricone bit, steel teeth tricone bit, rock bit.
2, certified by ISO and API
3, cover wide size code
4, best price
5, delivery on time
tricone bit:
We are a professional company in....
See more »HEJIAN HUASEN petroleum supplies co , ltd .our company has many industry experts in research and manufacture of diamond bit , also with many technical staff familiar with drilling .
The main....