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被美国GM公司电气动力部称之为“其有史以来最广泛深入细致的产品估算方案”将随其九月份第三代电传动内燃机车50系列的问世而显示其成效。自去年年初以来,已有23台四轴、四台牵引电机的GP40X试验型机车在圣得芬、联合太平洋、南太平洋和南方铁路线上作过细心的试运观察。投产的机车型号为四轴、四台牵引电机的GP50和六轴、六台牵引电机的SD50,两者功率皆为3500马力。在显著提高机车功率(原功率为3000马力)的同时,还大大地改进了机车粘着力。50系列的轮轨粘着力比原机车提高了18～24％,
Called by the US Department of Electric Company GM Electric Department “its ever-widest range of in-depth product estimation program” will be September with the third generation of electric drive diesel locomotive 50 series to show its effectiveness. Since the beginning of last year, 23 sets of four-axle and four traction motor GP40X pilot locomotives have been carefully commissioned for observation and inspection on the Saint-Denfending, United Pacific, South Pacific and Southern rail lines. Four locomotives were commissioned, the GP50 for four traction motors and the SD50 for six axes and six traction motors, both at 3500 horsepower. Significantly improve the locomotive power (the original power of 3000 horsepower), but also greatly improved locomotive adhesion. 50 series of wheel-rail adhesion than the original motorcycle increased by 18 to 24%