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Korrektionsglas n
industr., construct.	corrective lens
med.	correcting spectacles; corrective glasses; corrective spectacles
med.appl.	spectacle lens; correction lens
opt.	corrective glass; corrective-vision glass; corrective spectacle lens; correcting lens; ametropia-correcting lens

Korrektionsglas: 6 phrases in 2 subjects

Medical appliances	2
Optics branch of physics	4