Home / Standards / GB/T 34494-2017 GB/T 34494-2017 Active Hydrogen decrepitating neodymium iron boron permanent magnetic powder 氢碎钕铁硼永磁粉 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