
Heat-treatable steels, alloy steels and free-cutting steels - Part 4: Free-cutting steels (ISO 683-4:2016); German version EN ISO 683-4:2018
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Heat-treatable steels, alloy steels and free-cutting steels - Part 4: Free-cutting steels (ISO 683-4:2016); German version EN ISO 683-4:2018
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频