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Familiar with railway mechanical metal process, such as production, manufacture and repair of the coupler, buffer, car-body, bogies and other railway equipments.
熟悉铁路机械金属工艺，如车钩、缓冲器、车体、转向架等铁路机车车辆设备的生产、制造与检修。
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As this happens, the coupler between the buffet car and the first of the First Class coaches uncouples.
BBC: Hatfield: The accident in detail
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