The advantage of 3 d made in where? What processing convenience service? 来源：原创 时间：2019-09-08 A: 3 d take independent research and development of automated quotation system, the unit price is fixed, do good faith transp··· Other problems 来源：原创 时间：2019-09-08 A: more other problems can be feedback to the website the personnel of the service, we will reply as soon as possible.