A welder (machine for welding).

plural of smoke machine

A device that emits a dense vapour that appears similar to fog or smoke, used in theatre, film and other applications.

A device used to verify the mechanical laws of motion with constant acceleration, consisting of two objects of known masses connected by a string over a pulley.

plural of rope machine

A machine for making ropes out of yarn.

plural of Atwood machine

plural of welding machine

A time machine or other means of revisiting information about the past.

plural of rubbing machine