free-pistonCOCA²⁵¹⁴⁰⁴ 基本例句 自由活塞¹⁰⁰ The numerical method is a development from the operating principle of a heavy piston compressor and the utility program is very important to the design and calibration of a free-piston shock tunnel. 该方法是对自由活塞激波风洞运行理论的发展，形成的计算软件可直接应用于自由活塞激波风洞的设计和状态调试。 dictall