["防爆等级の确定について
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気の分类をした後、どのように防爆等级を确定するか？ 水素の温度组别はTで、电气的防爆等级为什么是T4？ 含氢煤气是否是按照水素来选择？
�干事创业的温度组别是T，电气的防爆等级为什么是T4 T4の等级更高啊！ T6は最高的等级！
温升等级通常都选择T4，当然你选择T6也行，等级越高越安全
T4の等级高呀，没关系，"
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