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单选题
475.FCV活门类型是( )What type is the FCV
A
电控气动弹簧负载开式活门 electrically controlled/pneumatically actuated/The spring load to closed
B
电控气动弹簧负载关式活门electrically controlled/pneumatically actuated/The spring load to open
C
气控气动弹簧负载开式活门 pneumatically controlled/pneumatically actuated/The spring load to open
答案解析
正确答案：B
解析：
题目解析
答案：B
解析：FCV（Flow Control Valve）活门控制气流流量，根据选项描述活门类型。B选项中的“电控气动弹簧负载关式活门”意味着这种活门是通过电气控制、气动驱动，并且弹簧的作用是将活门关闭。这与FCV活门的功能相符，它在关闭状态下通过电气控制和气动驱动来控制气流流量。
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