- PDC Drill Bit
- 2016-11-04 15:28
- We are committed to research the drill bit on the rock breaking mechanism, design theory, manufacturing process etc. Acc
- Caing and Tubing -2
- 2016-10-26 11:26
- Product standard: API SPEC 5CT, SY/T6194Specification:CasingOD: 114.3~508mm (4 1/2 ~20)Length: 5.5~22.23mSteel Grade: H4