Triple integral expression of the radiation impedance of square piston is deduced and the numerical results of the radiation impedance are calculated with the method of Gaussian numerical integral.
利用高斯数值积分方法，推导了方形活塞辐射阻抗的三重积分表达式，计算了方形活塞声源的辐射阻抗。
Piston, method for manufacturing the same, and cylinder component with the same.
活塞，用于制造该活塞的方法，和设置有该活塞的缸组件。
Based on ideal gas equation, the measurement method of diesel engine piston combustion chamber volume was researched.
应用理想气体状态方程，对柴油机活塞燃烧室容积的检测方法进行了研究。
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