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正角 zhèngjiǎostresses
math. прямой угол
tech. положительный угол
正角 zhèngjué
ironic. положительный персонаж
正角: 185 phrases in 16 subjects
Aviation6
Construction1
Electronics7
General38
Machine components1
Mathematics12
Mechanic engineering3
Mechanics2
Metrology1
Military10
Music1
Nautical2
Oil and gas1
Oil processing plants1
Technology96
Theatre3