PingBeam Plus 三合一声纳 455/800/1100KHz 侧扫频率455/800/1100KHz 底扫频率WideChirp 2D PingBeam 三合一声纳 455/800KHz 侧扫频率;455/800KHz 底扫频率;MidChirp 2D PingBeam Pico 底扫声纳 455/800KHz DownViewMidChirp 2D