温度组别 meaning in Chinese

temperature class

Dust explosive electric equipment and air explosive electric equipment temperature classes is the same
粉尘防爆电气设备的温度组别与气体防爆电气设备的组别划分相同。
Temperature of explosion - proof thermocouple and thermal resistance can be categorized into 6 classes t1t6 according to the highest surface temp of exposed parts
三温度组别防爆热电偶热电阻的温度组别按其外露部分允许最高表面温度分为t1t6