Tanatetee Rattanaruengyot และ Parames Chutima. (2014) DEFECT REDUCTION IN PLASTIC PIPE EXTRUSION PROCESS. Chulalongkorn University:ม.ป.ท.Tanatetee Rattanaruengyot และ Parames Chutima. 2014. DEFECT REDUCTION IN PLASTIC PIPE EXTRUSION PROCESS. ม.ป.ท.:Chulalongkorn University;Tanatetee Rattanaruengyot และ Parames Chutima. DEFECT REDUCTION IN PLASTIC PIPE EXTRUSION PROCESS. ม.ป.ท.:Chulalongkorn University, 2014. Print.