The CombiBox system is a fixed underground system for aircraft ground support.
There are many benefits to putting ground support services for commercial airliners in underground pits at terminal gates or remote stands. CombiBox has had some of its installations in place at Stockholm Arlanda Airport and Copenhagen Kastrup Airport for more than 20 years.
Veteran installations such as the ones at Stockholm and Copenhagen have proven the test of time, not to mention the bitter onslaught of the Scandinavian winter.