Home / Standards / GB/T 40793-2021 GB/T 40793-2021 Active Nonmetallic coatings for sintered neodymium iron boron permanent magnets 烧结钕铁硼表面涂层 Standard Type GBT ICS 77.120.99 CCS H65 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 国家标准委 Drafting Unit N/A