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- science and technology >TELEPHONES >TELEPHONES EQUIP & SYSTEMS WIRING & INSTALLATION
- science and technology >TELEPHONES >TELEPHONE EQUIP & SERVICE AT&T/LUCENT
- Other Professional Services >Telecommunication >TELEPHONE EQUIP & SERVICE NORTHERN TELE CO/NORTEL
- science and technology >TELEPHONES >TELEPHONE EQUIP & SERVICE PANASONIC
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