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effective field
 effective field
met. 有效磁场
| maintenance
 maintenance
gen. 保养常识
fin. 维持费; 维护费; 业务维持费
hydroel.st. 维护; 保养; 维修
met. 维持

to phrases
effective field
met. 有效磁场
tech. 有效场
effective field maintenance
: 19 phrases in 12 subjects
Architecture1
Aviation1
Earth sciences1
Electric machinery1
Electronics1
Engineering geology1
Geophysics1
Metallurgy2
Oil / petroleum1
Refrigeration1
Space2
Technology6