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Winkelspiegel m
gen.	prism
construct.	mirror square, optical square; mirror square; goniometer
life.sc., tech.	optical square
meas.inst., amer.	right angle square
opt.	roof mirror; bimirror; corner mirror
tech.	corner reflector
transp.	angular mirror

Winkelspiegel: 1 phrase in 1 subject

Optics branch of physics

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