Accordingly, the entire abrasive surface of the lapping film (25) can be utilized effectively and excessive pull-out of the lapping film (25) can be prevented effectively.

The metal brace is not costly, but it is very effective.

Alternatively, the main body is manufactured from a processed whetstone or from said grinding powder.

It is a fine, abrasive powder (like baking soda) that absorbs large amounts of water.

Keep the paper wet, cover the entire surface and then clean up to remove any abrasive powder.

It is a fine, abrasive, white powder (like baking soda) that absorbs large amounts of water.

For coating operations that use abrasive powder such as porcelain enamel, the wear resistant member may comprise ceramic.

According to the invention, an abrasive powder of mineral material (4) having millimeter-sized particles is also introduced into the intake of the chamber.

The working tool in the grinding machine is a tape with abrasive powder deposited on its surface.

The present invention can prevent penetration of abrasion powder generated in the sliding portions into the meshing section (28) via the gap (25).

A boart is a diamond of very poor quality that is used in powder form as abrasive.

A compression molding method in which the yield of a product can be enhanced by preventing mixing of abrasion powder produced through galling.

Foreign matter such as abrasion powder, which is contained in lubricant that flows in the gap (25), is trapped by the filter member (26).

The invention is particularly well suited for delivering abrasive powder to a hand-held dental tool (22) for abrasive treatment of teeth (26).

Batching of the abravise powder controlled by the difference between the signal proportional to the variation of weight and the preset signal of flow required.