hgundas 发表于 2020-4-20 03:59:49

ISO 683-4:2016 Heat-treatable steels, alloy steels and free-cutting steels —



ISO 683-4:2016
Heat-treatable steels, alloy steels and
free-cutting steels —
Part 4:
Free-cutting steels

admin 发表于 2020-4-25 23:19:36

谢谢您的分享，金币已奖励!
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