Lesson 27　Introduction to Plastics Molding and Processing

Theresinmanufacturingindustriesarethoseconcernedwithconvertingrawmaterialsintochemicalcompoundswhicharefurtherprocessedintothevariousplasticsresins.Theseresinsareproducedinmanyforms;asgranules,powders,liquidsorpastes,readytobesoldtocompanieswhichwillproce ......（本文共 8312 字 ）     [閱讀本文] >>