Through the first 13 weeks of this year to 30 March, US carriers originated fewer coal cars than during the same period in 2012, according to statistics from the Association of American Railroads. US railcar originations are down 7.9pc this year to 1.4mn carloads compared to last year.
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机译：名称：激光绑带蝙蝠速度训练器。描述：用臀部而不是上身（肩膀和手臂）摆动，可以提高击球速度。使用我们的Laser Strap Bat Speed Trainer时，如果您的上半身摇摆，则会导致地面球变弱，弹出或摇摆而丢失。激光绑带蝙蝠速度训练器可以将肘部紧贴身体，帮助您的核心保持与挥杆的连接。改善双手的上挥杆动作对于提高力量至关重要。
