| 发明名称 |
METHOD OF MANUFACTURING ARTICLES OF HIGH HARDNESS AND COARSE GRAINED PLATINUM AND IRIDIUM ALLOYS IN PARTICULAR FOR USE AS ELECTRIC CONTACTSV VYSOKOJJ TVERDOST'JU I KRUPNOZERNISTOJJ STRUKTUROJJ,PRIMENJAEMYJJ GLAVNXM OBRAZOM DLJA EHLEKTRISHESKIKH KONTAKTOROV |
