Sinopec (Beijing) Chemical Industry Research Institute Co., Ltd. Yanshan Branch Is Re-Recruiting (The First Re-Recruitment) Yanfen (Low Molecular Weight Polymerization) 5300481400/5300479024 High-Performance Liquid Rubber Temperature Control Equipment 1 Tender (K5Ae 25-05Z-1) Refrigeration And Heating Cycle Device\-10-300℃ 120L Tender Announcement