ISBN: 9787502158446 - 送书签~9787502158446-注聚工 教程（zz）/ 中国石油天然气集团公司人事服务中心 / 石油工业出版社 (1 Ergebnisse)

paperback. Zustand: New. Paperback. Pub Date: 2008 Pages: 442 Language: Chinese in Publisher: Petroleum Industry Press set of vocational skills training tutorial and identification questions: Note polyethylene workers (tutorial) Personnel Service Center of China National Petroleum Corporation unified organization written in vocational skills training tutorial with identification questions set in a. Polymer Injection work containing polymer injection work should have a basic knowledge of. expertise and knowledge. is a.…