1·Pratice economy will reach economical efficiency easily.
节俭就可以很容易地达到经济效益。
2·The equipment is shown to have reliability and economical efficiency.
实验表明，该后备保护装置具有很高的可靠性和经济性。
3·The results show that the method has satisfactory accuracy and high economical efficiency.
实例表明，该方法具有满意的精度和较高的经济性。
4·Working performance of condenser directly affects the heat economical efficiency of the system.
凝汽器工作性能的好坏直接影响到系统的热经济性。
5·The result proved the seal's good leak tightness, stability, reliability and economical efficiency.
使用的结果证明说明该密封具有优良的密封性、稳定性、可靠性和经济性。
6·Many enterprises just concern about quality's technical index, but ignore its economical efficiency.
许多企业只关心质量的技术性指标，而忽视了质量的经济性。
7·The putty developed was of good performance, very good application prospect and economical efficiency.
所研制的腻子性能良好，具有优良的应用前景和经济效益。
8·All these methods have their individual advantages and disadvantages with relatively low economical efficiency.
这些方法都各有利弊，经济效益也都不高。
9·The operation of condenser has a direct effect on economical efficiency, security and reliability of turbine unit.
凝汽器运行的好坏将直接影响汽轮机组的经济性、安全性和可靠性。
10·Poor durability, short service life and low economical efficiency of Bridges have become a worldwide difficult problem.
桥梁耐久性差、服务寿命短及全寿命经济性指标差等问题已成为世界性难题。