Rotary disc grinding stone

1. Rotary disc grinding stone

1 . 1 : Perspective view;

1 . 2 : Front view, with the left, right, and rear views being a mirror image thereof;

1 . 3 : Top view;

1 . 4 : Bottom view;

1 . 5 : Cross-section view, taken along the line A-A in reproduction 1 . 7 ;

1 . 6 : Cross-section view, taken along the line B-B in reproduction 1 . 7 ;

1 . 7 : Reference view.

The broken lines show portions of a rotary disc grinding stone which form no part of the claimed design.