Pellet Activated Carbon,Solvent Recovery Activated Carbon,Coal Activated Carbon Women Cashmere Sweater,Men Cashmere Sweater Co., Ltd. , http://www.nxactivatedcharcoal.com In the machine manufacturing industry, the application of thread grinders is more and more common, but often due to the poor rigidity of the workpiece and the accuracy of the machine tool, the grinding precision of the thread is affected. To this end, we take the following measures. First, the process parameters 1. Preparation before the grinding process (1) after the rough machining of the workpiece, quenching, ice-cold, qualitative treatment, semi-finishing, cold again,