I
• It will pay to inspect the tube bundles.
• The installation actually paid for itself .
• Tests indicate that the valve can pay out in 7 to 8 months.
• Recovery equipment costs less than 40,000 dollars with a payout of less than five months.
• Waste recovery pays off .
• The investment will amply repay itself in efficient service and utter reliability.
II
• If this block proves out , it will undoubtedly lead to adoption of such blocks for other cars.
• Total intravenous feeding has proved itself in the treatment of 1300 adults and more than 100 infants.
• Dye lasers still have to prove themselves in this area.
• The preceding generations of accelerators have proved their worth .
• This machinery has been proven throughout the world.
III
• Such efforts are always rewarding .