US2815611A - Machine and method for grinding turbine ...
US2815611A US311510A US31151052A US2815611A US 2815611 A US2815611 A US 2815611A US 311510 A US311510 A US 311510A US 31151052 A US31151052 A US 31151052A US 2815611 A US2815611 A US 2815611A Authority US United States Prior art keywords line grinding wheel valve contact Prior art date Legal status (The legal status is an assumption and is not a legal …