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China IR Grade/CaF2/Mgf2/Baf2/Lif/Si/Ge/Fused Silica Plano-Convex/Concave Cylindrical Lens, Find details about China Cylindrical Lens, Convex Lens from IR Grade/CaF2/Mgf2/Baf2/Lif/Si/Ge/Fused Silica Plano-Convex/Concave Cylindrical Lens