Within the growing period, the nutrient solution may require replacement.

Such a failure can require complete replacement of the expensive central unit.

In the weeks or months it takes to reach the oil deposit, the bit may dull and require replacement.

If you're thinking in decades rather than years, consider a better mower that won't require replacement so fast.

The engines require immediate replacement, and she will not be available throughout 2012.

By 20 years out, studies show, 20 percent will require replacement.

Fixing the problem was going to require complete replacement, and that would take hours.

Damage to the cable requires special skills to repair or total replacement.

The programming is permanent and further changes require replacement of the device.

This can reduce the sale price, or even cause the floor to require replacement.