相试验 meaning in Chinese

phase study

In the end of the dissertation , the lifetime of the experimental superheater and reheater tubes that have been used is evaluated by the methods of sress computation and the metallographic tests
最后，根据上述持久强度外推分析法、金相试验研究综合评估了截取在役的过热器和再热器管材的寿命。
At present , we have completed the finished precision casting assembly lines and air valve full cutting workmanship assembly lined and put it into use . equipped with ultrasonic flaw detector , diagrammatic device , physics and chemical metallography experiment etc . advanced inspection equipment
现已投产的有成套精密锻造生产线和气门金切工艺生产线，配备了超声波探伤仪理化金相试验等先进的检测设备。
In the end of the dissertation , a tube lifetime evaluation software system is developed with the utility of the finite element analysis stress computation and the metallographic tests . the lifetime of the platen superheater tube is evaluated by the software system
最后，综合以上应力解析法、有限元应力计算和余相试验研究开发了管件寿命评估软件系统，并使用该系统综合评估了屏式过热器管段的寿命。