特殊用法centre quad1.中心四绕组(电缆的)en quad1.【刷】半身空铅long pair twist quad1.长对四芯绞线组multiple twin quad1.【电工】复双四芯线组short pair twist quad1.短对绞四芯线组spiral quad1.单绞四芯线组star quad1.星形四线扭绞