1.   Hull steadies the club and tees up a ball, and Duggan activates the Swing Dynamics computer, which starts a timing mechanism.

2.   It controls the timing mechanism.

3.   Plants use this timing mechanism, called photoperiodism, to trigger flowering as well as other seasonal events.

4.   They said a short circuit in the timing mechanism was to blame.

5.   He had quoted police officials saying the bomb could have had a timing mechanism, a theory which would back up the HAMAS claim that it was an attack.

6.   A defective timing mechanism and a dud battery were all that averted a destructive blast.

7.   The official timing mechanism was inoperative during her event.