所有电气设备均为防爆设计，防爆等级ExdⅡBT4的翻译：All electrical devices are designed for explosion-proof, explosion-proof rank Exd II BT4 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

All electrical devices are explosion-proof design, explosion-proof grade exd Ⅱ bt4

All electrical devices are designed for explosion-proof, explosion-proof rank Exd II BT4

All electrical equipment is the explosion-proof design, explosion-proof rank ExdⅡBT4

All electrical equipment are explosion-proof design, fixture ExdIIBT Grade 4

All electrical devices are designed for explosion-proof, explosion-proof rank Exd II BT4