| 摘要 |
<p>The ultrasonic transmitter consists of a printed circuit having an electronic oscillator. The transmitter is contained in a casing fitted with a terminal block, a main fuse, control switches and on-off switch. The oscillator is connected to an amplifier having the same impedance. The oscillator is connected to a member of transducers equally spaced along the surface of the hull. The transducers are arranged in pairs such that there is no neutral zone between the transducers. The transmitters prevent the adherence of weed on the antifouling paint.</p> |
