7 Machine tools; internal and external circular grinders, centerless grinders, non-circular grinders and camshafts, crankshaft grinders, surface grinders and angle grinders, grinding machines; pencil grinders, honing machines; laser treatment machines (one-dimensional and multi-dimensional); eroding machines; laser machines; tool grinders; universal circular grinders; angular infeed grinders; high-speed grinders; internal and external thread grinders; groove grinders; polygonal grinders; cylinder grinders; production grinders; grinders and laser treatment machines (included in this class), controls for grinders and laser treatment machines