Article
簡便的樂器 - A simple and convenient music instrument

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Subject matters: Ornament,
Medium: Line drawing

Function: Unrelated to Article/Ad

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吹口琴的姿勢 - The position of playing a harmonica

Subject matters: Illustrative diagram,
Medium: Line drawing

Function: Related to Article/Ad

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口琴音節呼吸層次的註明 - Indication of breathing pattern for playing different harmonica notes

Subject matters: Illustrative diagram,
Medium: Line drawing

Function: Related to Article/Ad

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