用“platinum”造句大全，platinum造句
Buildingsareratedsilver,goldorplatinum.Edison'slabputalotofeffortintomakingabulbwithaplatinumfilament,butthatworkwentnowhere,becauseplatinumhasarelativelylowresistance.Soyabeansandplatinum,amongother...
用“platinum catalyst”造句大全，platinum catalyst造句
Mostfuelcellsbeingdevelopedforportableusearebasedondirect-methanoltechnology,whichrequiresanexpensiveplatinumcatalyst.Thepreparationof5Azeolitesupportedplatinumcatalyst,anditscatalyticcapabilitiesforh...