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normal surface
auto. 垂直正交; 线速度
math. 常态面
sport. 垂直 〔正交,法线速度〕面
sport., med. 垂直面; 正交面
tech. 法线速度面; 正态曲面
wind. 法面
normal surface: 26 phrases in 8 subjects
Bridge construction1
Business2
Desert science2
Navigation1
Oil / petroleum1
Refrigeration1
Statistics2
Technology16