DSJH-Type Petrochemical Process Pump Petrochemical Process Pump,Centrifugal Petrochemical Pumps,Petrochemical Industry Pump Shenyang pump products sales co., LTD , https://www.syipsc.com In machining, we often encounter sleeve-type parts with inner cylinder holes or inner cone holes with high precision and low surface roughness values, which need to be ground, and the existing tool grinding machines are equipped. The machining size and the structural design of the grinding head used to grind the inner circular hole have certain use problems and cannot be satisfied.