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单选题
2187. They are installed in such a manner as to discharge fluid from the pressure line into a reservoir return line when the pressure exceeds the predetermined maximum for which the valve is adjusted
A
它们的安装方式是当压力超过活门调节的预定最大值时,将油液从压力管路排放到油箱回油管路中。
B
它们的安装方式是当压力超过活门调节的预定最大值时,将油液从压力管路与回油管路的连接处排放到油箱中。
C
它们的安装方式是通过调节活门的最大预设压力,从而将油液从压力管路或回油管路释放到油箱中。
答案解析
正确答案：A
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