improved cylindrical resonator speaker
...s of continuous use 电池寿命长，大约有120个小时的连续使用 Improved cylindrical resonator speaker 圆柱谐振器扬声器的改进 This digital electric metronome delivers even clearer and more powerful sound, and Korg's acclaimed cylindrical speaker...
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improved cylindrical resonator speaker
改进的圆柱形谐振器扬声器
以上为机器翻译结果，长、整句建议使用 人工翻译 。