YouTube31 Jul 2021
15m

钢铁“焊”将艾爱国:身怀绝技 大国工匠攻克技术难关 | CCTV「焦点访谈」 20210730

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钢铁“焊”将艾爱国:身怀绝技 大国工匠攻克技术难关 | CCTV「焦点访谈」 20210730