| http://www.w3.org/ns/prov#value | - FIGS. 6a through 6c illustrate schematic diagrams for explaining the principle of the occurrence of ripples on the surface of molten silicon, and FIG. 7 is a graph showing schematically the relation between the degree of ripples and the light transmittance of silica glass with the temperature of the molten silicon near the silica glass as a parameter.
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