电磁活门应在图表中显示，并包含一条注释,说明活门是由弹簧加载在开位还是关位。
A.See the graphics for information of the solenoid valves which shall contain a note indicating the position of the valve(weather spring-loaded to its open or closed position). B.Solenoid valves indicated on the schematic shall have a notation indicating when the valve shall be spring- loaded to the open or closed position. C.Solenoid valves shall be indicated on the schematic and shall include a notation indicating whether the valve is spring-loaded to the open or closed position.正确答案C
