随着我国社会主义建设的迅速发展,全国焊条生产单位也逐渐增多,产品品种大量增加。因过去焊条牌号没有统一编制原则,各地生产的焊条均按自己确定的方法编制牌号。实际上有很多产品品种是属于同一类型,同一用途,配方、性能也大致相同,但牌号却各不相 With the rapid development of China’s socialist construction, the number of electrode production units in the country has also gradually increased, with a large increase in product variety. Due to the past, there is no uniform electrode welding principle, all over the production of electrodes according to their own established method of preparation of grades. In fact, there are many varieties of products belonging to the same type, the same use, formulation, performance are roughly the same, but the grades are different