软密封闸阀-标准汇总ANSI/NFPAT3.21.4R2-2000气动阀.NFPA/T2.6.1R2-2000补充件:液动元件压力额定值.检验疲劳和确定含金属外壳的软密封闸阀的压力的碎Pneumaticvalve-PressureratingsupplementtoNFPA/T2.6.1R2-2000,Fluidpowercomponents-MethodforverifyingthefatigueestablishingtheburstpressureratingsofthepressurecontainingenvelopeofametalfluidpowerpneumaticvalveBS4151-1967输入信号为3至151b/in压力计的阀***器的评定方法Methodofevaluatingpneumaticvalvepositionerswithinputsignalof3to15lbf/in泊头市腾博机械制造有限公司网址；http://联系人；及振联系电话；159327159120317-8032185传真；0317-8177085)