从国际市场来看，1963年到1983年这20年间，全世界螺杆压缩机销售量每年增长率为30。
From the international market, in 1963 and 1983 these 20 years, all over the world screw compressor 30 annual growth rate of sales.
市场引力包括企业销售量(额)增长率、目标市场容量、竞争对手强弱及利润高低等。
Market attraction includes enterprise sales volume (amount) growth rate, target market capacity, competitive strength and low profit.
尤其近几年在原材料价格上涨、物流成本提高的压力下，大多数大中企业销售额的增长率低于销售量的增长率；
Especially as the rise in price and the pressure of high cost in circulation, most of the big companies'amplitude in sales is lower than before.
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