PHẦN XV KIM LOẠI CƠ BẢN VÀ CÁC SẢN PHẨM BẰNG KIM …
Dec · For this purpose (a) Iron and steel or different kinds of iron or steel are regarded as one and the same metal (b) An alloy is regarded as being entirely composed of that metal as an alloy of which by virtue of Note it is classified and (c) A cermet of heading is regarded as a single base metal