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与1989年相比,1990年美国国内建筑材料发货量(以不变价格计)降低了0.7%。各类建材1988～1991年的国内发货量见下表(百万美元)与1989年
Compared with 1989, domestic domestic construction materials shipments (in constant prices) decreased by 0.7% in 1990. Domestic shipments of various building materials from 1988 to 1991 are shown in the table below (millions of US dollars) and 1989