Article
乾洗皮貨的便利法 - Convenient methods of dry cleaning leather products

Subject matters: 新知 - new knowledge,
Language level: Wenyan

Keywords: practical instruction , animals, hygiene, water, chemistry, cotton, dry cleaning,

Persons:
陳筠軒 Chen Junxuan (Author)

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Article
自己製鏡的方法 - Ways to make your own mirrors

Subject matters: 新知 - new knowledge,
Language level: Wenyan

Keywords: practical instruction , history, water, chemistry,

Persons:
陳筠軒 Chen Junxuan (Author)

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