And Hence Economical

Hence, the research and development of the remote controlled close-quarter radioactive equipments with large dosages has the obvious economical and social benefit.

因此，高剂量近距离遥控放射治疗机的研制和开发具有非常明显的经济效益和社会效益。

Encouraging results have been obtained, which prove that mercury vapor survey is a rapid, economical and effective method in high and cold mountain areas, which hence deserves popularization.

结果表明，壤中汞气测量在高寒条件下仍是一种快速、经济、有效的方法，具有推广价值。

Hence, this paper introduces the technical system of machinery subsoiling and land-preparation, and analyzes the economical benefits of this technology using in Qinggang County.

为此，介绍了机械深松整地的技术体系，并以青冈县为例进行了经济效益分析。