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огива n stresses
math.	累积曲线，卵形线; 百分位曲线
stat.	累积曲线
tech.	卵形线; 分布曲线; 尖拱形; 尖弯窿; 累积频率曲线
огивой n
tech.	尖拱的; 尖拱形的

огива: 3 phrases in 3 subjects

General	1
Geology	1
Statistics	1