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seoiˎ₄垂sin˗₃線
(垂线)
Pinyin
chui2 xian4
Translations
noun
perpendicular; vertical line
dingˊ²頂seoiˎ₄垂sin˗₃線
(顶垂线)
Pinyin
ding3 chui2 xian4
Translations
noun
altitude