C
CHEMISTRY; METALLURGY
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C03
GLASS; MINERAL OR SLAG WOOL
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C03C
CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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C03C3/00
Glass compositions
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C03C3/04
containing silica
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C03C3/076
with 40% to 90% silica, by weight
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C03C3/078
containing an oxide of a divalent metal, e.g. an oxide of zinc
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