(2x15cm)→來回深度 x 3(focusing) x 200 (line/frame) x FR (frame/s) = 1540 m/s
18000 x FR = 154000cm/s
FR = 8.5 frame/s
30.穿透深度為15 cm,三個焦點且每幅畫面有200條掃描線,則最大畫面率為:..-阿摩線上測驗