
BS ISO 683-1. Heat-treatable steels, alloy steels and free-cutting steels. Part 1 . Non-alloy steels for quenching and tempering
出版:British Standards Institution

专家解读视频
BS ISO 683-1. Heat-treatable steels, alloy steels and free-cutting steels. Part 1 . Non-alloy steels for quenching and tempering
出版:British Standards Institution
专家解读视频