压电式外部驱动蜂鸣器

	31.3毫米压电音频指标， 3 - 20 V条， PC安装，启封 31.3mm piezo audio indicator, 3-20V, pc mount, unsealed

	24.2毫米压电音频指标， 3 - 20 V条， PC安装，启封 24.2mm piezo audio indicator, 3-20V, pc mount, unsealed

	28压电音频指标， 3 - 28 V的，法兰安装，带引线 28mm piezo audio indicator, 3-28V, flange mount with lead wires

	50毫米压电音频指标，3 -1 6伏直流电，导致电线，2 .5千赫，安装制表符，体积挡板 50 mm piezo audio indicator, 3 - 16 V dc, lead wires, 2.5 KHz, mounting tabs, volume baffle

	42毫米压电音频指标，3 -2 8伏直流电，P C安装，2 .8千赫 42 mm piezo audio indicator, 3 - 28 V dc, pc mount, 2.8 KHz

	41.8毫米压电音频指标， 3 -2 8伏直流电，导致电线，2 .8千赫，安装制表符，脉搏缓慢 41.8 mm piezo audio indicator, 3 - 28 V dc, lead wires, 2.8 KHz, mounting tabs, slow pulse