GB 9254-2008 radiation disturbance class A GB 9254-2008 conducted disturbance class A GB/T 17626.2.2006 electrostatic discharge level 2 GB/T 17626.4-2008 pulse group immunity level 2 GB/T 17626.5-2008 surge immunity level 2 GB/T 17626.6-2008 conducted immunity level 2 |