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’¼Œa ƒÓ1mm
’·‚³ ‚k150mm
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�yY2O3�z5.3�}0.2
�yAl2O3�z1.0�}0.2(Max%)
�ySiO2�z0.15(Max%)
�yFe2O3�z0.01(Max%)
�yTiO2�z0.15(Max%)
�yNa2O�z0.05(Max%)
�yCaO�z0.05(Max%)


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