设计结果表明：该测速系统简单、实用，经济性好；
The design result shows that the hardware circuit of control system designed simply, practical, economically and stably.
生产的热效率高，节约环保，经济性好，被称为多功能锅炉。
Production of high thermal efficiency, saving environmental protection, economical, known as the utility boiler.
实验证明，该焊条具有良好的工艺性能和焊接质量，是一种效率高、经济性好的新型焊接材料。
The experiment has proven that it can perform quite well in the welding and bring a satisfactory result, being an economical new-type weld material with high efficiency.
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