Liu Ping, a computer numerically controlled (CNC) machine tool operator working at Chongqing Chuanyi Control Valve Co Ltd, is pictured at the company's workshop on Nov 14, 2017. [Photo by Zhu ...

KALAMAZOO, MI – Kalamazoo Valley Community College is now offering machine tool operator, CNC (Computer Numerical Control) operator, and welding certificates of achievements to help students ...