亚洲国产中文亚综合在线欧美_天堂BT另类专区日韩AV_在线视频五月丁香婷婷中文字幕_国产91边对白在线播放_超巨胸喷奶水视频www免费网站_欧美日韩中文字幕日韩欧美_亚洲一级毛片视频在线_日本乱偷互换人妻中_五月婷婷综合久久久_国产精品欧美亚洲制服

IP code protection grade is introduced

IP is Ingress Protection, IP rating for electrical equipment enclosure Protection grade of foreign invasion, the source is the international electrotechnical commission IEC 60529 standard. In the standard,
in view of the electrical equipment enclosure protection of foreign body, IP protection grade is composed of two Numbers, format IPXX, where XX is two digits, the first digital representation contact
protection and foreign body protection level (dust, the highest level is 6), the second digit said waterproof protection level is highest level (8)

Note: with Japan industrial standard JIS waterproof level is close to Japan's industrial JIS waterproof is highest magnitude 9 (IP9K)

The first digit: dust level

The second digit: waterproof level