The muscle package is also a technology that requires constant maintenance.

In addition, the new buildings will lessen the requirement for constant maintenance.

In the real world, of course, it requires constant maintenance.

But shacks require constant maintenance, and weather is always a threat.

But the engine along with its drive system were very prone to break down and needed almost constant maintenance to keep the tank running.

With constant maintenance and training duties after standing watch, they were lucky to get four or five hours sleep in a day.

The lifeboat needed constant maintenance to keep the weather out.

These files will need constant maintenance as staff progress within the company.

However, it requires constant maintenance, for which the necessary funding is not always guaranteed.

Concern has been raised for the future of the site, which requires constant maintenance due to the harsh surrounding environment.