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/ What does the zone in the explosion-proof grade mean?
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What does the zone in the explosion-proof grade mean?
气体爆炸环境:
0区:永久或长时间存在易爆气体
1区:偶尔出现易爆气体
2区:只在短时间内出现少量易爆气体
粉尘爆炸环境:
20区:永久或长时间存在易爆粉尘
21区:偶尔出现易爆粉尘
22区:只在短时间内出现少量易爆粉尘
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