工业过程测量和控制系统用模拟输入数字式指示控制仪 第2部分：时间比例输出仪表
Digital indicating and control instruments with analogue inputs for use in industrial-process measurement and control systems - Part 2:Instruments with time proportional outputs

2014-05-06

工业过程测量和控制系统用模拟输入数字式指示控制仪 第1部分：两位或多位输出仪表
Digital indicating and control instruments with analogue inputs for use in industrial-process measurement and control systems - Part 1:Instruments with two-or multi-state outputs

2014-05-12