经济组合 meaning in English

economic groupings

Economical combination of length with distance of reinforcing soil pile to treat soft subgrade
加固土桩处理软基桩长与桩间距的经济组合
With the rapid development of shanghai ' s electric power , a scientific and reasonable programming guiding the transportation system of yangtze river is necessitated so as to meet the need of forming the most profitable combination between the installments of shipping lines and the operating ships
上海电力的快速发展已迫切要求长江电煤的运输系统航线设置和配船作出科学合理的规划，以满足航线设置和运输船舶间的最佳经济组合。