| 摘要 |
<p>The blade (10) has an abrasive crown (18) fixed on fixation crown (14) provided on a circumference of a metallic support disk (12). A set of hooking notches (16) is formed on the fixation crown for hooking the abrasive crown on the fixation crown. The notches are radially extended towards interior of the fixation crown so as to have an inlet orifice on an outer contour of the fixation crown, after a round-shaped extension of the notches in a circumferential direction with respect to circular shape of the fixation crown. The disk has lightening notches (26) between the adjacent hooking notches.</p> |
