华伟DH-60直流电流表DC1A2A3A5A10A15A20A直通400A/75mV开孔52mm*

DH-52SO-52型圆形指针式直流机械船形电流表头DC1A2A3A5A10A15A

川崎85C1型指针式直流电流表面板式机械表DC1A2A3A5A10A/75mv