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1 jan 420 ano - 【南朝】为了防止在烧制过程中气体和有害物质污损坯件，工匠把坯件放在耐火泥制成的匣钵中【南北朝】出现以灌钢法制作的农具

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人教版高中历史|Chinese students' PEP SENIOR HIGH HISTORY TEXTBOOKS

29 set 2024

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1 jan 420 ano

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~ 1606 years ago

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