The phrase "are only operable" is correct and usable in written English.
It can be used to indicate that something can function or be used exclusively under certain conditions or limitations.
Example: "The devices are only operable when connected to a power source."
Alternatives: "can only function" or "are solely usable".
As a series configuration, the subsystem is only operational if both components are operable.
As the world tosses and turns, optimism is the only operable option.
Unfortunately surgery in itself is not very effective, with 50% of stage I patients and 80% of stage II patients dying within 5 years and an overall cure rate from the small fraction of operable patients being only around 20% (Gilbert et al, 2002; Gillison et al, 2002).
Participants were women aged 70 years or over with clinically defined operable primary breast cancer: TNM classification T1-3 and T4b where there was only minor skin involvement, N0-1, mobilymphmph nodes (Union Internationale Contre le Cancer, 1987).
This is key because previously Groups was only able to be controlled by IT admins, whereas now admins can let users create "user-managed" groups which are operable by any employees of an organization using Apps.
Those that have lifts tend either to be broken or only operable with a key which I was unable to find anywhere.
The Poles think the Patriots will become not only operable, but interoperable, over time - thus enhancing Poland's air defense.
[C] O - V - A Only operable, but not visible and approachable.
Although surgical resection offers the best long-term survival for lung cancer patients, only a subset of these patients are considered operable and chemoradiation is the only option for the majority of patients (Manser et al, 2005).
Partially disable sensors, sensors that are still operable, but have poor detection capability.
