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Advanced CAD/CAM
Automated Analysis Corporation
Advanced Technology Services
Caterpillar, Inc.
CGN & Associates
Clark Engineers MW, Inc.
Cope Plastics, Inc.
DP Filters, Inc.
Danimal Corp.
E-G Products Div, E-G Groups, Inc.
Graves Environmental Safety, Inc.
Hanley Steel, Inc.
Harding ESE
Illinois Machine & Tool
Illinois Valley Plastics, Inc.
International Supply Company
Jones Sewing Machine Company
Keystone Steel and Wire, Co.
Kirby Risk Electrical Supply
Lynch Aluminum Mfg. Co.
Martin Engineering
MCP, Inc.
MH Equipment Co.
Morton Buildings, Inc.
Philippi-Hagenbuch, Inc.
Randolph & Associates Inc.
River City Enterprises
Rohn Industries, Inc.
Sawmill Hydraulics, Inc.
Special Engery Products Co. Inc. (SEPCO)
Sprinkmann's Insulation
Tri-State Performance Systems, Inc.
Troy-Jenn, Inc.
Xcell Mechanical Systems