And without careful maintenance, he added, the missiles would be unusable after two weeks.

On the other hand, they cost more and require careful maintenance.

With careful maintenance, a violin can last and improve for many years.

Its installation was something of a tape-and-chewing gum job, though, and needed careful maintenance.

The antique forms are dead, despite the careful maintenance of the institutions; those institutions now have no meaning or weight.

They need more careful maintenance because some internal moving parts are exposed to water and any contaminants in the water.

Frequent cleaning will preserve their appearance; careful maintenance will insure long life.

They rode well, and their weapons had the appearance that comes with careful maintenance over many years.

How can the extreme flourish in any kind of family without careful maintenance of the ordinary?

Their goal has succeeded: in the years since that time, careful maintenance has prevented deterioration, and no major changes have been made.