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first harmonic
 first harmonic
auto. 基 波
el. 基波; 基谐波
el.mach. —次谐波
| magnetic field
 magnetic field
tech. 励磁
wind. 磁场

to phrases
first harmonic
auto. 振动
el. 基波; 基谐波
met. ; 一次谐波
first order harmonic
el.mach. —次谐波
first harmonic magnetic field
: 11 phrases in 3 subjects
Electric machinery4
Electronics3
Technology4