11.   On no condition should untrained personnel use the equipment.

12.   Rescue workers had to use special equipment to cut open the steel doors.

13.   Special drilling equipment is being used to tunnel beneath the sea bed.

14.   The equipment could be used by criminals to tune in to police broadcasts.

15.   The equipment was used to clear the scattered wreckage of the two trains.

16.   ...drug users who use unsterile equipment for injections of drugs.