有环的,有环纹的;
Design and Study of Dynamic Foundation of Annulated Column Which Sustains the Amplitude Airship in the Happy Valley in Beijing
北京欢乐谷聚能飞船圆环柱动力基础设计研究
Finally, the weight, the strength and the stability of the domed bulkhead with nonaxisymmetry sphere-conical transitional annulated shell of some middle-size submarine before and after optimization have been contrasted with examples.
最后用某中型艇的非轴对称球锥过渡环壳的球面舱壁进行实例分析,对比优化前后球面舱壁的重量值及强度与稳定性性能。
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