Specific purpose: if the use of chemical companies need to consider the use of explosion-proof type.
特定用途：如果是化工企业使用则需要考虑采用防爆型。
Car body external indicator light (led explosion-proof type), need installed on both sides of each car shall not be less than 6 light (a car has been flow power supply).
车体外部两侧需安装指示灯(LED防爆型)，每车不得少于6盏(一车一直流电源)。
Disclosed is a safety explosion proof type sodium hydride adder which is an integral structure.
安全防爆型氢化钠添加器，是一个整体结构。
Disclosed is a safety explosion proof type sodium hydride adder which is an integral structure.
安全防爆型氢化钠添加器，是一个整体结构。
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