国产乱女乱子视频在线播放,国产黄片免费观看在线,开心婷婷五月激情综合社区,久久噜噜色综合一区二区

產(chǎn)品列表

 
新聞資訊 / News
電加熱器電氣設備英文標準
康能電加熱器  發(fā)表時(shí)間:2016-10-10
IEC 60227 Olyvinyl chloride insulated cables of rated voltages up to and including 450/750V -
fart 1: General requirements

IEC 60332 Tests on electric cables under fire conditions IEC 60364 Electrical installations ofbuildings
IEC 60439 Low-voltage switchgear and controlgear assemblies

IEC 60445-1999 Basic and safety principles for man-machine interface,marking and dentification - Identification of equipment termina1s and of terminations of certain designated tonductors ,including general rules for an alphanumeric system
IEC 60529-2001 Degrees ofprotection provided by enclosures (IP Code)

IEC 61024 Protection of structures against lightning
[返回]