11.   Regular servicing ensures vehicles operate at their maximum levels of efficiency and safety.

12.   Such systems could operate at lower cost than current methods and May soon become commercialized.

13.   The army plans later to fit Challenger with a new gun operating at even higher pressure and firing an improved shell.

14.   The catch is that it operates only at temperatures just above absolute zero.

15.   The duppy can only operate at night and will expect a reward on returning to its grave.

16.   The plant is operating at maximum capacity.

17.   The Securities and Exchange Commission has been able to operate at full strength by using excess fee collections from prior fiscal years.

18.   These averages are dictated largely by the very high proportion of volunteers that operate at club level.