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Certificate of Registration (API Specification Q1)

Certificate of Authority to use the Official API Monogram (API 7-1)

Certificate of Authority to use the Official API Monogram (API - 5CT)

Certificate of Authority to use the Official API Monogram (API - 5DP)

CERTIFICATE OF CONFORMITY OF ENVIRONMENTAL MANAGEMENT SYSTEM

CERTIFICATE OF CONFORMITY OF ENVIRONMENTAL MANAGEMENT SYSTEM

CERTIFICATE FO CONFORMITY OF QUALITY MANAGEMENT SYSTEM

CERTIFICATE FO CONFORMITY OF QUALITY MANAGEMENT SYSTEM

Tianhe Oil Group Huifeng Petroleum Equipment CO. ltd.
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