| http://www.w3.org/ns/prov#value | - FIGS. 4A and 4B show a detailed structure of the brush dresser in dressing unit 14, wherein FIG. 4A is a bottom view, and FIG. 4B is a cross-sectional view taken along line b???b of FIG. 4A. The brush dresser 11 is in a disk form and comprises a dresser body 13 having a brush 12 on an entire area of a lower surface thereof.
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