| 摘要 |
PROBLEM TO BE SOLVED: To design an operation button being transilluminated from the back side capable of still reading a mark even after long use, and having the brilliant surface. SOLUTION: This operation button has a base body made from a transparent material, the base body has opaque coating formed on one side, the opaque coating has at least one opening for forming a mark, and the opaque coating 2 is formed on the back side of the base body 1.
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