先有普通鋼,除了特鋼,餘下皆為普通鋼,普通鋼也分類吧?
所有跟帖:
• 連結構鋼都是特鋼,想來想去就沒啥普通鋼了。 -hkzs- ♂ (36 bytes) () 02/05/2023 postreply 13:29:48
• 連結構鋼都是特鋼,想來想去就沒啥普通鋼了。 -hkzs- ♂ (36 bytes) () 02/05/2023 postreply 13:29:48
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