| Allied Chimney & Construction (Elgin, IL)
|
| Alpha Environmental Svc Inc (Brighton, MA)
|
| Alpha Southwest Inc (Albuquerque, NM)
|
| Alstrom Corp (Bronx, NY)
|
| American Boiler & Chimney (Cranberry Twp, PA)
|
| American Steel Fabricators Inc (Farmington, MI)
|
| American Tank & Vessel Inc (Baton Rouge, LA)
|
| Apel Machine & Supply Co Inc (Hanceville, AL)
|
| Aqel Sheetmetal (New York, NY)
|
| Arrow Tank & Engineering Co (Minneapolis, MN)
|
| Atk Propulsion & Controls Div (Los Angeles, CA)
|
| Auburn Tank & Mfg Co (Auburn, NY)
|
| Avel Corp (Murrieta, CA)
|
| B & R Welding Svc Inc (East Haven, CT)
|
| Bae Armament Systems Div (Aberdeen, SD)
|
| Baltimore Aircoil Co (Milford, DE)
|
| Bambacigno Steel Co (Modesto, CA)
|
| Barber Welding & Mfg Co (Bell, CA)
|
| Barber Welding Inc (Weedsport, NY)
|
| Belew's Welding Svc (Tavares, FL)
|
| Belgrade Steel Tank Inc (Belgrade, MN)
|
| Bishopric Inc (Cincinnati, OH)
|
| Blagrave & Duffey Inc (Houston, TX)
|
| B-Line Filter & Supply Co (Odessa, TX)
|
| Bolinger Welding & Fabrication (Buffalo, WY)
|
