复审 气动阀用橡胶密封圈 沟槽尺寸和公差
复审 气动阀用橡胶密封圈 尺寸系列和公差
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 fatigueestablishing 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（ding）位器的评定方法 method of evaluating pneumatic valve positioners with input signal of 3 to 15 lbf/in
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