CNAS accreditation represents the highest standard for recognizing the competence of testing and calibration laboratories in China, with its accreditation results mutually recognized by international ...

Since its founding in 2017, Leanon Petroleum Technology has rapidly emerged as a rising force in the industry through its unique “full industrial chain” strategy and digital transformation approach. T...

China's offshore oil and gas exploration sector has delivered encouraging news. CNOOC's Tianjin Branch recently announced the successful completion of a challenging exploration well in a Bohai oilfiel...

CF-4, CH-4, CI-4, and CJ-4 are quality grades for diesel engine oils. For example, CH-4 indicates a CH-grade quality level, with the “4” signifying it is for four-stroke engines. Currently, CF-4 and C...