circular piston source 圆形活塞声源 ; 圆形活塞源
Non-circular piston 非圆活塞
circular piston radiator 圆形平面发射器
non-circular piston pinhole 活塞异形销孔
radiating of circular piston 活塞辐射
circular piston sound source 圆形活塞声源
Through comparison, it shows that at the same value of frequency and size, the far field of hexagonal piston is more uniform than that of circular piston.
结果表明，与圆形、方形活塞的辐射远场相比，在声波频率、活塞面积相同条件下，六边形活塞声源的辐射远场相对比较均匀。
A built-up circular piston sound source is established in this paper. The directivity formula of its far field is obtained, and its validity is simulated.
依据本文构造的组合圆形活塞声源，导出了该声源远场指向性公式，并对其正确性和有效性进行了仿真研究。
Thin, circular, steel bands fit into grooves around the piston to seal the bottom of the combustion chamber.
把薄的，圆形的，钢圈放进活塞周围的凹槽以密封燃烧室的底部。
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