GB/T 21220-2007

GB/Z 150-2025 Guide for magnetizing behaviour of permanent magnets GB/T 21219-2007 Magnetic materials - Classification GB/T 24270-2009 Method of measurement of temperature coefficient of magnetic properties of permanent magnetic materials GB/T 24296-2009 Standard specifications for sintered soft magnetic materials GB/T 13888-2009 Method of measurement of the coercivity of magnetic materials in an open magnetic circuit GB/T 24612.1-2009 Requirements for electrical safety in the workplace - Part 1: General rules GB/T 24612.2-2009 Requirements for electrical safety in the workplace - Part 2: Safety measure of operation on power off GB/T 11436-2012 Chemical analysis methods for products and semi-finished products made of soft ferrite materials