在过去的6年里,北美市场伸缩臂式多功能工程机的销售呈戏剧性增长。其中最重要的原因是此类机型良好的经济性——一种机器可适应多种作业需要。由于不断扩大的市场需求,促使制造商们不断加大对伸缩臂式多功能工程机的投资,增加产品品种,提高产品性能。仅在1997年,该类机就增加了近40个新 In the past six years, North American market telescopic boom multi-purpose engineering machine sales showed dramatic growth. One of the most important reasons is the good economy of this type of machine - a machine that can be adapted to a variety of work needs. Due to the ever-expanding market demand, manufacturers are urged to continually increase their investments in telescopic boom multi-purpose machines, increase product variety and improve product performance. In 1997 alone, nearly 40 new aircraft were added