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spectral ['spektrəl] adj.
chem.	widmowy; spektralny
metrol.	gęstość widmowa; natężenie widmowe

spectral: 104 phrases in 23 subjects

Analytical chemistry	7
Antennas and waveguides	12
Chemistry	4
Communications	1
Construction	4
Earth sciences	1
Electronics	7
Environment	1
Food industry	1
Immigration and citizenship	1
Lighting other than cinema	31
Mathematics	11
Medical	2
Metrology	6
Natural sciences	1
Nuclear physics	1
Photography	1
Physical sciences	1
Piezoelectric crystals	1
Radio	2
Radiology	1
Transport	2
Vacuum tubes	5