国产 亚洲 自拍 欧美,日本三级香港三级人妇99,中文久久国产影视,日韩性爱电影一区 ,精品一区二区三区三区,日韩精品一区在线观看,久久精品第一页,久久中文字幕视频

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)