21.   At some parks maintenance work has been postponed to avoid closings.

22.   Because refinery profits were so low, maintenance work was moved up by a month or two.

23.   Before the maintenance work began, Whelan said, the press was shut down and, the workers thought, the tanks depressurized.

24.   Bodies require buildings where this maintenance work can be carried out.

25.   Boeing also expects the region to lead all other areas in traffic growth, which, along with more airplanes, creates greater demand for maintenance work.

26.   Boeing Co. may rise after the aerospace firm said it formed a unit to seek out airline maintenance work.

27.   -- Press the Defense Department to transfer maintenance work from military depots to private companies.

28.   A BHP spokesman would not clarify how long it would be before maintenance work is complete and the operation is shut.

29.   A computer service company has accused Hewlett-Packard of refusing to sell software service agreements to companies that use other firms for their computer hardware maintenance work.

30.   A defense department report calls for privatizing depot maintenance work.