1. 原料初碎PRECRUSHING OF RAW MATERIALSHard materials (硬質料) like feldspar長石,quartz (石英),may be precrushed (初碎),in order to reduce (減少) the grinding (研磨) time during preparation (制備).The hard materials are charged (裝) to an impact crusher (錘擊破碎機),for reduc (本文共 14039 字 ) [閱讀本文] >>