API TR 13M-5-2018 Procedure for Testing and Evaluating the Performance of Friction (Drag) Reducers i API TR 2577-2018 Performance of Full-bore Vortex Meters for Measurement of Liquid Flows API STD 20L-2018 Qualification of Polymeric Seal Manufacturers for Use in the Petroleum and Natural AATCC EP7-2021 Evaluation Procedure for Instrumental Assessment of the Change in Color of a Test Spe API TR 6MET-2018 Metallic Material Limits for Wellhead Equipment Used in High Temperature for API 6A API TR 979-2018 Applications of Refractory Lining Materials (FIRST EDITION) API TR 13TR3-2018 Size Measurement of Dry, Granular Drilling Fluid Particulates (FIRST EDITION) 耐腐蚀用镍合金的焊接制造指南 Guidelines for the welded fabrication of nickel alloys for corrosion-resistant servic