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espectral adj.
light.	طيفي

espectral: 90 phrases in 15 subjects

Acoustics	1
Antennas and waveguides	7
Automatic control	1
Electronics	9
Environment	1
Forestry	2
International Monetary Fund	2
Lighting other than cinema	27
Mathematics	8
Piezoelectric crystals	1
Radio	2
Radiology	1
Remote sensing	22
Statistics	1
Vacuum tubes	5