Any of a series of chemically similar, radioactive elements with atomic numbers ranging from 89 ( actinium ) through 103 ( lawrencium ).锕类任何化学性质相似, 原子序数在89 ( 锕 ) 与103 ( 铹 ) 之间变化的放射性元素....
The model of vibration picking for a vector hydrophone is established.摘要本文建立了矢量水听器的拾振模型,并分析推导了其拾振条件.Fiber optic hydrophone unit is the basis of fiber optic hydrophone system.光纤水听器探头是光纤水听器系统的基石.Compared with the pressure ...