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harmonic average
 harmonic average
math. 调和平均值
oil 调和平均
stat. 调和平均数
| index
 index
el. meas.inst. 指示器
met. 标志; 符号; 指针
sport. 指标

to phrases
harmonic average
math. 调和平均值
oil 调和平均
stat. 调和平均数
tech. 调和均数
harmonic average index
: 4 phrases in 4 subjects
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