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1967～1977年,美国铁路新造与改造货车辆数列于表1。从表1可知,这11年中共新造与改造货车739,913辆,即平均每年67,265辆。估计1978年美国新造与改造货车数约为68000辆。 1978年,美国铁路货车定货数为145293辆,其中“各种工业的”买主定货为39939辆,这一买主很笼统,可能与其他买主有重复。美国《铁路时代》杂志估计实际定货数为127000辆。这些定货中,少量的已于1978年
From 1967 to 1977, the number of newly built and reconstructed U.S. railways was listed in Table 1. As can be seen from Table 1, the number of newly built and reconstructed trucks in the 11 years was 739,913 units, or 67,265 units a year on average. It is estimated that the number of newly built and reconstructed trucks in the United States in 1978 was about 68,000. In 1978, there were 145,293 orders for U.S. rail cars, of which 39,939 were “buyers of various industries”. This buyer is very general and may overlap with other buyers. The United States, “Railway Times” magazine estimates the actual number of 127,000 units. A small amount of these orders were made in 1978