HOUSING
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Carbon steel
Ex d II B T4 Gb Ex:Explosion Protection (防爆標誌)
d:Flameproof enclosure (隔離型) II:Gas Vapor (氣體 蒸氣) B:Ethylen (乙烯) T4:135°C (135°C) Gb:Explosion gas atmospheres(用於爆炸性氣體環境的設備) Zone 1 and Zone 2 for explosive gas hazardous locations withClass II Class B Group T4 and below
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