SZD-21 electric tachometer produced by SHANGHAI AUTOMATION INSTRUMENT TACHOMETER AND INSTRUMENT MOTOR CO., LTD. - 副本
SZD-2 electric tachometer produced by SHANGHAI AUTOMATION INSTRUMENT TACHOMETER AND INSTRUMENT MOTOR CO., LTD.
SZD-1 electric tachometer produced by SHANGHAI AUTOMATION INSTRUMENT TACHOMETER AND INSTRUMENT MOTOR CO., LTD.
