CR400BF系列动车组压力波保护系统主要由压差传感器、压力波控制装置、组成
—I'msorr()
A. Well, its OK.
B. No, its all right.
C. You are welcome.
D. You are wrong
在CR400BF系列动车组车轮超声波探伤作业中,轮缘部位:不允许存在达到刻槽当量大小
—Hey,Tom,what'sup?—()
A. Yes, definitely!
B. Oh, not much.
C. What is happening in your life?
D. You are lucky