yāpíng qūxiàn

== Mandarin == === Romanization === yāpíng qūxiàn (Zhuyin ㄧㄚ ㄆㄧㄥˊ ㄑㄩ ㄒㄧㄢˋ) Hanyu Pinyin reading of 壓平曲線 / 压平曲线