44557 ⎘
Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor for grinding balls involving grinding wheels of cup type
GRINDING TOOL FOR BUTTONS ON A ROCK DRILL BIT
#2LACROSSE BALL RESURFACER
#3Polycrystalline diamond elements having convex surfaces
#4Surface grinder for ball of ball valve
#5Bowling ball resurfacing apparatus
#6Sander apparatus and method