| http://www.w3.org/ns/prov#value | - This light source device comprises a concave surface of revolution, which may be a spherical, parabolic, elliptical or other surface, and which has a notched reflecting mirror 101, a metal halide lamp 102, a mouth piece 103 to hold the lamp 102, and a mounting piece 104 to hold the mouth piece 103 on the reflecting mirror 101.
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