voice-operated relay声控: sound control; voice control继电器: electric relay; relay声控继电器电路: voice-operated relay circuit; vox磁控继电器: magnetic control relay; magneticcontrol relay光控继电器: phoforelay; photorelay; photoswitch; phototroller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:声控继电器，即可在微信中查询翻译
