Glass type Article L W T n d v d STEP; n d N‑SK2 SCHOTT 1532390 280 +20; ‑0 160 +5; ‑0 40 +10; ‑0 1.60738 56.65 0.5 N‑SK2 SCHOTT 1001613 190 ± 30 180 ± 30 140 ± 30 1.60738 56.65 3 N‑SK2 SCHOTT 1712027 280 +20; ‑0 230 +5; ‑0 40 +10; ‑0 1.60738 56.65 1
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