【单选题】
检查刹车储压器的预充压力___
A. 需释放系统压力
B. 需释放油箱压力
C. 需使用气压表进行测量
D. 以上都需要
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答案
A
解析
暂无解析
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前起落架后部上方有一个小孔,我们在维护时使用它主要是___
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【单选题】
安全活门的作用:___
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【单选题】
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【单选题】
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