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Name：Explosion proof electric whistlenumber：BDD-5120
Name：Explosion proof electric bellnumber：BDL-5220
Name：Explosion-proof intercomnumber：BDJ-5130
Name：Explosion-proof telephonenumber：BDH-5230
Name：Explosion proof fire alarm buttonnumber：BHN-5140
Name：Explosion proof smoke sensornumber：BYC-5340
Name：Explosion proof combustible gas detectornumber：BRC-5340
Name：Explosion proof axial fannumber：BZF-5150
Name：Explosion-proof exhaust fannumber：BPS-5250
Name：Explosion-proof fannumber：BDS-5350-L
Name：Explosion-proof fannumber：BDS-5350-B
Name：Explosion-proof fannumber：BDS-5350-D
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