| 摘要 |
PROBLEM TO BE SOLVED: To provide a door frame with an internal window to be hardly stained. SOLUTION: The door frame comprises an external window 14 connected to the front face and made of a transparent member, and the internal window 13 connected to the rear face and made also of a transparent member. A stainproof film 16 is formed on the outer surface of the internal window 13, so that the internal window 13 is hardly stained even if an impure washing solution etc. is sprayed over the outer surface of the internal window 13, and the excellent visibility can be secured for a long period of time. COPYRIGHT: (C)2006,JPO&NCIPI
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