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double-lined spectroscopic binarystresses
astrospectr. спектрально-двойная система (звёзд; аналогично multi-line(d) spectroscopic binary: e.g. triple-line(d), etc. magnetar)
double-lined: 36 phrases in 16 subjects
Astronautics1
Biology1
Construction4
Electronics2
Entomology1
Ichthyology5
Information technology4
Mathematics1
Medical1
Nautical1
Oil / petroleum1
Programming1
Rail transport2
Sports1
Technology9
Telecommunications1