liuxilin1215 发表于 2014-1-1 08:08:50

IEC 60534-6-1985

IEC 60534-6-1985 Industrial-process control valves Part 6: Mounting details for attachment of positioners to control valve actuators


admin 发表于 2014-1-2 18:36:27

谢谢您的分享，金币已奖励！
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