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单选题
864、Solenoid valves shall be shown with a notation indicating whether the valve is spring-loaded to the open or closedposition.
A
Solenoid valves shall be shown with a mark. The mark indicates whether the valve is spring-loaded to the open or closedposition
B
Solenoid valves shall be shown with a notation. The notation, indicates the spring is loaded by the valve to the open orclosed position
C
Solenoid valves shall be shown with a symbol. The valve indicates whether the valve is spring-loaded to the open or closedposition.
答案解析
正确答案：A
解析：
解析:注释:notation= symbol 符号,记号。loaded to 加载到,加载至。
相关知识点：
电磁阀标记开闭位置
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