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English thesaurus
natural frequency
abbr.	nat. freq. (металлург.)
tech., abbr.	nat freq.

natural: 96 phrases in 16 subjects

Agriculture	4
Animal husbandry	3
Economy	11
Electronics	2
Energy industry	4
Environment	42
Finances	2
General	10
Law	2
Microsoft	6
Natural sciences	4
Obsolete / dated	1
Politics	1
Procedural law	1
Statistics	1
Transport	2