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单选题
1122、如果为阀门或控制建立符号或图案,这种类型的装置在整个手册中都要用它。使用的符号应在原理图的图例块中显示和标识。
A
If a symbol or device is established for a valve or control, it shall be used for this type of unit throughout the manual. The symbols used should be shown and identified in legend a block on the schematic diagram.
B
B: If a symbol or device has been set up to a valve or control, the equipment type will be referred, to as this symbol or device. throughout the manual. The legend block in the diagram displays or identifies symbols or device.
C
If symbol or design is specified for a valve or control, this type of device is used throughout the section of the manual. The symbols used can be found and identified in the legend block cof0the schematic. a
答案解析
正确答案：A
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