短語詞組短語bottom reflection wave 樁底反射sea bottom sand wave 海底沙波bottom -mounted wave direction meter 海底波浪方曏儀bottom standing wave 底層駐波bottom wave number 底波數(shù)量reflected bottom wave 水底反射波bottom wave attenuation coefficient 底波衰減系數(shù)bottom velocity of wave motion 波浪底流速 返回 bottom wave