1.In gasdynamics and chemical lasers, the supersonic diffuser plays an important role in the pressure recovery system.

1.在气动和激光器系统研制中，压力恢复系统扩压器设技术研具有重要的工程应用价值。

2.The process beginnng from powder burning to the ejection pistons pushing out the bomb and its moving back was analyzed applying classical interior ballistics and gasdynamics theory.

2.给出了对某型号挂弹钩的算，算结果与试验结果基本相符。