在线国产精品视频_成人看片在线观看_性色av一区二区三区_欧美精品一区二区三区在线播放_亚洲欧洲一级片_91一区二区

1、 Scope of products applicable for anti-corrosion level testing and certification:

The anti-corrosion level testing certification is applicable to anti-corrosion electrical and electronic products used indoors and outdoors, including household and similar appliances, road electrical equipment, elevator electrical components, electromechanical equipment, lighting appliances, electronic information and multimedia equipment, and other products.

2、 Based on the standard:

3、 Corrosion protection level classification: Outdoor level 3, Indoor level 2

Service Hotline: 18924609560 (same WeChat account)