Partnership will increase capabilities and market diversity De Pere, WI – On December 28, 2012, The C.A. Lawton Co. (Calco) formed a joint venture with Centerline Machining & Grinding Inc. This new partnership between two Green Bay, WI, area businesses, to be known as Centerline Machining & Grinding, LLC (Centerline), consists of Centerline’s assets and operations, as well as contributions of capital and…