| 摘要 |
PROBLEM TO BE SOLVED: To provide a long-lasting inexpensive glass tray. SOLUTION: At least on one side of a rectangular glass 10, a half column section 11 having a diameter in the same or roughly the same thickness A as the glass is formed. A flat face is formed by cutting the top part 12 of the section 11 by a face crossing the face of the glass at right angles. Accordingly the part of the glass where a positioning pin touches is a half column section, the concentration of stress is alleviated preventing the corner of the glass from being broken. In addition because the top of the section is a flat face, the face can touch the positioning pin evenly, which lowers stress and thus prevents a break.
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