
Heat-treatable steels, alloy steels and free-cutting steels; part 14: hot-rolled steels for quenched and tempered springs
出版:International Organization for Standardization

專家解讀視頻
Heat-treatable steels, alloy steels and free-cutting steels; part 14: hot-rolled steels for quenched and tempered springs
出版:International Organization for Standardization
專家解讀視頻