44619 ⎘
Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding pistons
Apparatus and method for processing piston
Method and apparatus for grinding rotors for hydraulic motors and apparatus therefor
Method of making piston using polishing removal of thermal barrier coating (TBC) material