21.   Since this covers only about a third of those who are retired, it led to a dual system.

22.   The government has announced plans to phase out the dual pricing system over the next two years.

23.   The plant transfers energy from the reactor to turbines through dual systems of circulating water.

24.   United States was seeking radical changes in the dual key system which was widely seen as allowing cautious U.N. civilian officials to blunt previous airstrike threats.

25.   Vietnam has followed a dual pricing system in which foreigners and overseas Vietnamese pay higher prices than local citizens for air fares and some services.

26.   Vietnam currently imposes a dual pricing system in which foreigners and overseas Vietnamese are charged more than local Vietnamese for air fares, electricity and other services.

27.   He argued that a dual system such as that used at Milford was preferable.

28.   Both Britain and France admit that the dual key system in its current form is cumbersome for military officials and requires modifications.

29.   Burns also reiterated US demands that the current dual key system giving the United Nations a veto over NATO air strikes be abandoned.

30.   But in the other two provinces -- Free State and Northern -- local government officials will be chosen on a dual system of voting for individuals and for parties.