By the way was 25 years ago, 50 years ago, 100 years ago, there are work places, dangerous in every industries including hi-tech.
25年前，50年前，100年前，工作地点是这样的，在包括高科技的产业中都是很危险的。
Explosion proof performance: This product is intrinsically safe explosion-proof highest level (IA), available in various inflammable and explosive places (including 0 districts) work completely.
防爆性能：本产品具有本安型最高防爆等级(ia)，可在各种易燃易爆场所(含0区)内完全工作。
Explosion proof performance: This product is intrinsically safe explosion-proof highest level (IA), available in various inflammable and explosive places (including 0 districts) work completely.
防爆性能：本产品具有本安型最高防爆等级(ia)，可在各种易燃易爆场所(含0区)内完全工作。
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