["[Gefäßbau--Größe-Gruppe-Quelle-Dr-Quelle-Technologie-Diskussion-Forum-Tägliche-Aufgabe-Nr.-433]", "[Gefäßbaubau--Größebaubau-Gruppebaubaubau-Qubaubaubau-Technologiebaubaubau-Diskbaubaubau-Diskbaubaubau-Täbaubaubau-T3baubaubau-4baubaubau-b3baubaubau-bbaubaubau] Der渗碳是向钢的表面渗入碳原子的过程。判断 对 备注：当日题目当日有效（33baubaubau-正3baubaubau错baubaubau，灌水删除baubaubau-b大面积回复历史贴baubaubau-视为刷帖baubaubau-b不给 Baubaubau-或者酌情给 Baubaubau]

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