A cap with a flat circular top and a visor.

有一个圆形平顶和帽舌的帽子。

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Basing on the potential theory, hydrodynamic pressure on the side of circular pile cap with harmonic horizontal movement was investigated.

基于速度势理论，研究了水中桩基圆形承台作水平简谐运动时，承台侧面的动水压力。

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The utility model is composed of a top-sucking disk, a hanging chain, a decorative cap, a supporting rod seat, a supporting rod, a circular ring, a lamp holder arranged on the supporting rod, etc.

具有吸顶盘、挂链、装饰盖、撑杆座、撑杆、圆环，以及设置于撑杆上的灯座等构成。

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