Lightning Arrester,8KA,40V,1700~1990MHz,500W,DIN  | 
Feeder Lightning Arrester,Current Flow 8KA/Residual Voltage,DIN-50M/DIN-50F,300W,800~960MHz  | 
Signal Lightning Arrester,550A,25V,5V,1W,9600bps,DB37,Only for environment alarm box's EAC socket  | 
Signal Lightning Arrester,500A,25V,5V,1W,9600bps,DB25  | 
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