The phrase "are operating simultaneously" is correct and usable in written English.
It can be used to describe two or more processes or actions that are happening at the same time.
Example: "The two systems are operating simultaneously to ensure maximum efficiency in the workflow."
Alternatives: "are functioning at the same time" or "are running concurrently."
This paper proposes an approach enable engineers to point out quantitatively the noisiest source for modification, while multiple machines are operating simultaneously.
Due to this fact, it's rather obvious that both companies retain their current brand names and are operating simultaneously.
This pic also shows an installation problem which is allowed under manufacturer specs, but may lead to less than optimal performance if both pumps are operating simultaneously: one heat exchanger blows air directly at the other.
The reason for this may be looked into the negative inductive and positive mesomeric effects of these groups, which are operating simultaneously but in opposite directions, neutralizing the effect of negative charge on the halogen atom.
Because the second (cap formation) and third (spine formation) geotropic responses overlap, there is a brief period where two different geotropic responses are operating simultaneously.
Many of these mechanisms have been unraveled and it may well be that several mechanisms are operating simultaneously.
The major components of the machine, which are operated simultaneously, include: a proportional pressure-controlled hydraulics power pack, a mechanical transmission system with electromagnetic clutch, and a brake and automation control with SCADA computer analysis interface.
During this phase, data processing and writing to HDFS are operated simultaneously; thus, we can take the maximum time of them and the final time of this stage (Eq. (13)).
The music's mixture of primitive and refined elements gives the album the richness of a double vision that is operating simultaneously at all times.
