Acupuncture chart from Hua Shou (fl. 1340s, Yuan dynasty). This image from Shi si jing fa hui (Expression of the Fourteen Meridians). (Tokyo: Suharaya Heisuke kanko, Kyoho gan 1716).
photo by 滑寿 Hua Shou - 《(大字)十四经发挥》/wiki Public Domain
현대 치과 치료 장치
photo by 설탕 주둥이/wiki CC BY-SA 3.0