A numerical method is presented for predicting the motion characteristics of high - speed displacement catamarans in waves.给出一种基于 高速 细长体理论的预报排水型双体船在波浪上运动性能的数值方法.The results are in good agreement with Atkinson numerical s...
Machine parts of irregular shape can be washed very clean by ultrasonics.用超声波能把形状不规则的机件洗得很干净.In medical and other applications of ultrasonics , a variety of electronic instrumentation is used.超声波在医学和其它应用中, 要使用许多电子仪器设备.Th...