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- AAC Srl
- Aalborg Instruments
- Aavid Thermalloy SARL
- Aavid Thermalloy Srl
- ABB Industria Spa
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- ABB S.p.A. Process Automation Division
- ABB SACE S.p.a.
- ABB Spa - ABB Sace Division
- Abc Tools spa
- acceed GmbH
- ACCRETECH (Europe) GmbH – Filiale Italiana
- ACE Stoßdämpfer GmbH
- Adalta
- ADVANCED MICRO CONTROLS, INC.
- Advanced Technologies Spa
- Advantech Europe B.V.
- Advantech Europe BV
- Advantech Italy
- Aeco srl
- Aeroel Srl.
- Aeroflex Incorporated
- Aerotech Ltd
- Agilent Technologies Italia Spa
- Air Liquide Italia Spa
- Alfamatic S.r.l.
- Alfamotori
- Altra Industrial Motion
- AMA Service GmbH
- AMETEK Italia Srl - Divisione AMT
- AMETEK S.r.l.
- Ami
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- AMO Italia Srl
- Ampere SpA
- Amphenol Industrial Operations Europe
- Amphenol Industrial Operations Europe
- Amphenol Italia Srl
- Analog Devices GmbH
- Analog Devices Srl
- Andantex Spa
- Anders Electronics Plc
- Anders Electronics Plc
- Andit Automazione s.p.a
- Angelo Romani S.p.A.
- Angst+Pfister spa
- ANIE Energia
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- Apex Auctions LTD
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- Arbor Italia
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- Arrow Electronics Italia
- ARTEC srl
- Arteclima Srl
- Artema sas
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- Asem Spa
- ASHKENAZY ZALSMAN
- Asita srl
- ASM Automation Sensorik Messtechnik GmbH
- ATAM Spa
- ATech elektronika Doo
- ATEQ Systemes Analytiques Italia Srl
- Atlas Copco Italia Spa
- Atlas Copco Kompressoren GmbH
- ATMEC Srl
- Atos Spa
- ATTI Srl
- Autec Srl
- Autodesk Spa
- Automata SpA
- Avago Technologies Italy Srl
- Aventics Srl
- Avnet Abacus c/o Avnet EMG Italy s.r.l.
- Avnet Silica
- Axel Srl
- Axelent Tecnel Srl
- AXU srl
- AZMEC Srl