Sinopec Materials And Equipment Department (International Business Company) 2026 Sinopec Oilfield Chemical Agent Centralized Bidding (Public Centralized Qualification Pre-Qualification, 67,000 Tons Of Emulsion-Type Fracturing Thickener) Polymer\Fracturing Thickener Chemical Cross-Linked Suspension Emulsion Q/Sh Cg0154/T≤40S Η≥45Mpa.S M≥25Mpa.S Pre-Qualification Announcement