他们还强调了避免表面比较和“升降机经济学”(elevator economics)的重要性，“升降机经济学”强调不同时间和不同国家间的微小差异。
They also say the importance of avoiding superficial comparisons and "elevator economics" that stress small differences over time and across countries.
一种充气升降机，包括至少三个相互叠置的提升气垫并设置成相互间气流连通。
A pneumatic lift including at least three jacking-mattresses stacked one atop another and arranged in airflow communication with one another.
这一升降机可以通过在楼层间货升降层之间的运输线路或机械进行露台和夹楼的直达运输。
These package lifts provide nonstop transportation to or from balconies and mezzanines, over aisles or machinery, between floors or conveyor levels.
应用推荐