см. тж. иметь ~ срок службы
• The microscope makes possible lengthy ( or prolonged , or protracted ) investigations with small objects.
• The unit will function for extended ( or prolonged ) periods.
• Over the extended trial period the enlarger has exhibited ...
• Long-term storage ...
• Prolonged heating at such a temperature favours further grain growth.
• Prolonged service testing has proved that ...
• Long-term measurements ...
• The Plummer-Vinson syndrome is usually found in women after long-standing iron deficiency.