external current电流: electric current电路电流: circuital current定态电路电流: steady short circuit current脉冲轨道电路电流: impulse track circuit current外电路: external circuit下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:外电路电流，即可在微信中查询翻译
