There was no indication of hostile fire, officials said, saying it appeared the chopper went down because of some other problem, possibly mechanical.
官员表示，没有迹象表明，飞机在坠毁前遭到了地面火力袭击。因为飞机在失事前是断路器着地的，很可能是机械故障。
The basic principle of controlling the voltage build-up rate of chopper is adopted to reduce the current impact, which stables the running of mechanical and electrical system of locomotive.
采用通过控制斩波器电压上升斜率以减小电流冲击的基本原理，使机车的机电系统达到运行平稳。
The mechanical composition of newly designed side trimmer and chopper in transform to cold rolling recoiler line, and of main technical data and features in designing structure are introduced.
介绍了冷轧切边重卷机组改造中，新设计切边圆盘剪及碎边剪的设备组成、主要技术参数及设计结构特点。
The mechanical composition of newly designed side trimmer and chopper in transform to cold rolling recoiler line, and of main technical data and features in designing structure are introduced.
介绍了冷轧切边重卷机组改造中，新设计切边圆盘剪及碎边剪的设备组成、主要技术参数及设计结构特点。
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