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Division 1
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‧Explosionproof耐壓防爆 ‧Intrinsically safe (2 fault) 本質安全防爆 ‧Purged/ pressurized (Type X or Y) 內壓防爆
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Zone 0
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‧Intrinsically safe, 'ia' (2 fault) ‧Class I, Division 1 Intrinsically safe (2 fault) 本質安全防爆
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Zone 1
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‧Encapsulation, 'm' 模鑄防爆 ‧Flameproof, 'd' 耐壓(防火)防爆 ‧Increased safety, 'e' 安全增防爆 ‧Intrinsically safe, 'ib' (1 fault 本質安全防爆 ‧Oil immersion, 'o'油入防爆 ‧Powder filling, 'q' 充填防爆 ‧Purged/pressurized, 'p' 內壓防爆 ‧任何Class I, Zone 0 方法 ‧任何 Class I, Division 1 方法
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Division 2
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‧Hermetically sealed ‧Nonincendive ‧Non-sparking ‧Oil immersion ‧Sealed device ‧Purged/ pressurized (Type Z) ‧Any Class I, Division 1 method ‧Any Class I, Zone 1or 2 method
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Zone 2
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‧Energy Limited, 'nC' ‧Hermetically sealed, 'nC' ‧Nonincendive, 'nC' ‧Non-sparking, 'nA' ‧Restricted breathing, 'nR' ‧Sealed device, 'nC' ‧Any Class I, Zone 0 or 1 method ‧Any Class I, Division 1 or 2 method
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