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Settling The Great Crystal Debate. Sapphire Vs. Hardlex...
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日期：2026-04-23
A domed watch crystal will not distort the face of the watch if it is ground as a plano lens, i.e. the curvature of the bottom side matches the curvature of the top side of the crystal. When ground this way, it forms a plano lens which will neither magnif...看更多
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