- 標準光学研磨（赤外分光グレード）（Polishing grade=Spectroscopic grade)
- 寸法公差 ±0.1mm （Tolerance ±0.1mm）
- Orientation：無印(no remarks)= Random cut <111>：Oriented cut
- 無印 ＝ 両面研磨 (Both faces polished) B/P ＝ 片面研磨 (One face polished only)
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