According to the designer ' s experience and consulting the typical formula , firstly , to determine tentative materials " contents , then to adjust them by experiments , to be improving step by step and to constantly bring forth new ideas in the design 但是我國(guó)目前在焊材的設(shè)計(jì)方法上仍然以手工設(shè)計(jì)為主,一般是憑借設(shè)計(jì)者的經(jīng)驗(yàn),參考典型配方,初步擬定各物質(zhì)的含量,再通過(guò)實(shí)驗(yàn)加以調(diào)變,逐步完善或改造創(chuàng)新。