Home / Standards / GB/T 7549-1987 GB/T 7549-1987 Abolished Synchronizing universal coupling with ball and sacket--Type，foundational parameters and main dimensions 球笼式同步万向联轴器型式、基本参数和主要尺寸 Standard Type GBT ICS 21.120.20 CCS J19 Status 废止 Issue Date 1987-03-21 Implementation 1988-01-01 Responsible Dept 国家标准委 Drafting Unit N/A