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

一、什么是IECEx認證？ 1、IECEx是國際電工委員會（IEC）爆炸性環(huán)境用設備標準認證體系的簡稱，專門從事防爆產(chǎn)品的安全認證，其目的是保證防爆產(chǎn)品安全水平的前提下，消除易燃易爆環(huán)境中使用的……

ATEX是歐盟CE認證的防爆指令，屬于強制性的認證要求。指令代碼是2014/34/EU，認證標準是EN60079系列。企業(yè)常說的防爆CE認證、2014/EU/34或者EN60079標準認證，其實指的都是ATEX認證。 關于ATEX防爆認證機構，有多個機構可以發(fā)證，它們都是歐盟ATEX的公告機構，具備相同的發(fā)證資質(zhì)。常見的認證機構包括TUV、CSA、TI、ECM等。這些機構在認證過程中，通常會……

In 2014, the European Union issued the new ATEX (Equipment for explosive atmospheres) directive 2014/34/EU, which has been officially implemented since April 20, 2016. With the update of the directive……

CE certification is a mandatory certification for the EU market, and equipment and products entering the EU market must pass the relevant CE directive certification. For example, there are EMC directi……

With the release and implementation of the new version of the national standard GB/T3836-2021, domestic explosion-proof standards have further aligned with international explosion-proof standards. The……

ATEX explosion-proof certification needs to be carried out in accordance with the EU Explosion proof Directive 2014/34/EU (the old directive was 94/9/EC), and different products are suitable for diffe……