Drill String Cross-over Sub uses AISI4145H chromium-molybdenum steel, execute API specification.We can produce the same-dia type, reducers type and L-type three types, the screw can be cold thread rolling, copper or phosphate treatment.
KUNFENG Steel offers a wide range of advanced and standard aluminum machining services for aluminum products. We specialize in customized machining services to
We are the professional crusher parts manufacturer. We product Impact Crusher liner plates(impact plates) for Impact crusher parts and we created a cement mill warehouse and kept 12 years long record. Nobody breaks until now: We succeeded researching