dial back例句

dialup拨号dialn.拨号盘；刻度盘；日晷；钟面v.拨号；打电话dialkyl alkylene diphosphonic acid亚烷基二烷基双膦酸diallyl dimethyl ammonium chloride二甲基二烯丙基氯化铵dial service auxiliary switchboard辅助拨号交换台dial service assistance switchboard拨号服务辅助交换台dialytic ascitic ultra-filtration透析腹水超过滤dialphamethylbenzyle thylenediamine二-α-甲基-苄基乙胺, 二-α-甲基-苄基乙撑二胺dial indicator measuring instrument千分表测量仪Dial Tone Continues After Off-Hook摘机后拨号音不断dialed number identification service来话号码识别业务dial teletypewriter exchange service直拨式电传交换业务