| Somerset Controls Inc (Middlesex, NJ)
|
| Sonex Research Inc (Annapolis, MD)
|
| South Broad Lukoil (Philadelphia, PA)
|
| Southern Mechanical & Controls (Wetumpka, AL)
|
| Spectrodyne Inc (Quakertown, PA)
|
| Spectrum Infrared Inc (Cleveland, OH)
|
| Springfield Precision Instrmnt (Wood Ridge, NJ)
|
| Sterimatics Corporation (Bedford, MA)
|
| Stewart Instrument Co (Gonzales, LA)
|
| Stillings Instrument Co (Royal Oak, MI)
|
| Sun Infrared Technologies Inc (O Fallon, IL)
|
| Sunn Technology Portable Air (Des Moines, IA)
|
| Superior Sensors (Plains, MT)
|
| Superior Systems Technology (Lees Summit, MO)
|
| Sure Temp (Port Clinton, OH)
|
| Svanaco Inc (Chicago, IL)
|
| Sws Systems Inc (Roebuck, SC)
|
| Syncro Vac Inc (Milpitas, CA)
|
| System Controls Inc (Liberty, MO)
|
| Systematix Controls Inc (Seattle, WA)
|
| Tank Products Inc (Ontario, CA)
|
| Technical Applications Inc (Broomall, PA)
|
| Tectrol Associates (West Springfield, MA)
|
| Tejax Engineering Corp (Brooklyn, NY)
|
| Teknik Systems Inc (Poplar Grove, IL)
|
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