Thematerialsusedinthesecategoriesallhavefinitedutiestoperformwithinarubberformulation.Therefore,eachwillbediscussedinthesequencealreadylistedearlierinlasttwolessons.Rubbers(hydrocarbon): Reclaimrubbercanplayanimportantpartinthefunctionofgeneralorspecialis (共 9500 字) [阅读本文] >>