hair (collected from a comb) 41 52.3 Tóugòu 頭垢 Human dandruff 24 52.4 Ĕrsāi 耳塞 Human earwax 6 52.5 Xīgòu 膝垢 Human knee dirt 0 52.6 Zhǎojiǎ 爪甲 Human nails...