About Yang Yuxia
About 済源職業技術学院机電工程系,河南済源,459000
About Tang Jinjin
About 済源職業技術学院机電工程系,河南済源,459000
About Gao Qingran
About 済源職業技術学院机電工程系,河南済源,459000
About Nanfang Nongji
About impeller
About sprue
About Injection molding
About インペラ
About 設計