Assessment of Surface Quality during EDM of AISI 4147 with Copper Tool Journal title: International Journal of Experimental Research and Review Authors: Durgesh Verma, Bhanu Pratap Singh, Ajay Kumar, Syed Asghar Husain Rizvi Subject(s): Cattle, Dairy processing. Dairy products, Biological Sciences, Chemistry, Computer and Information Science, Mathematics, Miscellaneous, Medical Education