标准中文名称 标准英文名称 ansi/nfpa t 3.21.4 r2-2000 气动阀.nfpa/t 2.6.1 r2-2000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液动气动阀的压力的碎 pneumatic valve-pressure rating supplement to nfpa/t2.6.1 r2-2000,fluid power components-method for verifying the fatigueestabl**hing the burst pressure ratings of the pressure containing envelope of a metal fluid power pneumatic valve bs 4151-1967 输入信号为 3至151b/in压力计的气动阀**的评定方法 method of evaluating pneumatic valve positioners with input signal of 3 to 15 lbf/in 20210311