Home / Standards / GB/T 34491-2017 GB/T 34491-2017 Active Coatings for sintered neodymium iron boron permanent magnets 烧结钕铁硼表面镀层 Standard Type GBT ICS 77.120.99 CCS H65 Status 现行 Issue Date 2017-10-14 Implementation 2018-05-01 Responsible Dept 国家标准委 Drafting Unit N/A