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