... 音乐美学家 musical aesthete 音乐门铃 music door-bell 音乐名作 masterpieces of music ...
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BTE-MUSIC-DOOR-BELL 型号
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This AC electronic music door bell is composed of general electronic door bell, rectified power supply, relay and power amplifier and does not need battery to power it.
本发明涉及一种用交流电的电子音乐门铃,由普通电子门铃加整流电源、继电器及功率放大器构成。本发明不再需要电池供电。
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