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73. In the United States, nonaerospace systems, primarily for state and municipal governments, utilities, surfacetransportation companies, hospitals, and other segments of the medical community, represent a significant portion of total sales.
在美国,非航空设备的主要客户是各州和市政府、公用事业公司、地面运输公司、医院和其他医疗机构,这些设备的生产占总销售量的很大一部分。
74. Between 1940 and 1980 in the United States, for example, per-acre yields of corn tripled, those of wheat and soybeans doubled, and farm output per hour of farm work increased almost 10 fold as capital was substituted for labour.
例如,美国在1940~1980期间玉米的亩产量增加了2倍,小麦和大豆增加了1倍;换算为现金计算,每工时的农业产量增加了近9倍。