电话指导无法解决时，应安排上门维修。
Telephone guidance can not be solved, should arrange door-to-door repair.
对电子电话机的设计、使用和维修具有指导意义。
It's a guide to design, use and repair of Electronic Telephone set.
热切欢迎国内外相关客商亲临指导或通过电子邮件，电话，传真向我们直接查询。
Welcome to contact with us by E-mail, telephone, fax or contacy us directly.
热切欢迎国内外相关客商亲临指导或通过电子邮件，电话，传真向我们直接查询。
Welcome to contact with us by E-mail, telephone, fax or contacy us directly.
应用推荐