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H71W-40P ≤200 硝酸等腐蝕性介質(zhì),H71W-40H 4.0 6.0 4.4 ≤300 水、蒸體、油品等,H71W-25P ≤200 硝酸等腐蝕性介質(zhì),H71W-16T 1.6 2.4 1.76 ≤200 水、蒸體、油品等