Two leading US defence contractors have reported sales pressures even as the war in Ukraine boosts demand for their weaponry, with production hamstrung by shortages of parts and labour.
美国两家领先国防承包商报告销售压力。尽管乌克兰战争推高了对其武器的需求，但零部件和劳动力短缺阻碍了生产。
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