A&L Underground, Inc.
USA, horizontal directional drilling

A.hak nederland b.v.
Netherlands, design, construction and maintenance of utility networks

A/S Tobias Jensen Production Ltd.
Denmark, manufacturer of electronic capacitors

ABB ALSTOM POWER Sweden AB
Sweden, steam turbines and gas turbines for power generation, mechanical drives

ACTLEM
design, develop and produce complete applications for permanently installed Power Quality measurement systems

Advanced Energy
USA, power conversion and control system solutions, process monitoring and control tools, ion-beam sources, and plasma abatement systems

Advanced Testing Systems Inc.
USA, Electrical equipment maintenance

AER Energy Resources, Inc.
USA, development and commercialization of high energy density zinc-air batteries

Aggreko plc
UK, supply of temporary power, temperature control and oil-free compressed air services

Air Products and Chemicals, Inc.
USA, LNG heat exchange

Air-X-Changers
USA, air-cooled heat exchangers

Al Bawardi Enterprises
United Arab Emirates, LV and MV switchgear, MCC, power control centres, UPS systems, transformers, ring main units, load break switches, fuses, fuse links, stationary and mobile generating sets, electrical meters, etc.

Alfa Laval AB
Sweden, high-performance separation systems, heat exchangers, fluid handling equipment