黄瓜视频软件免费下载,黄瓜视频色版,成人黄瓜视频APP,黄瓜视频在线观看入口

Explosion proof certificates and coal safety certificates are applicable to different places,

Explosion proof certificate generally refers to places used to remove various explosive gases and dust underground in coal mines

Coal safety certificate refers to the safety symbol certificate used for equipment and products underground in coal mines

So, whether to apply for an explosion-proof certificate or a coal safety certificate depends on where the product is used. If used only in non coal mine explosive gas and dust areas, having an explosion-proof certificate is sufficient. If it is necessary to use coal mines underground, a coal safety certificate is required, and the two are not interchangeable.

For more details, please feel free to send us a private message!