Frame:function
[actor <a href="stop-watch.html">stop-watch</a>] [not-actor <a href="stop-watch.html">stop-watch</a>] [actor <a href="light-bulb.html">light-bulb</a>] [actor <a href="electricity.html">electricity</a>] [actor <a href="engine.html">engine</a>] [requires <a href="fuel.html">fuel</a>] [actor <a href="machine.html">machine</a>] [range <a href="set.html">set</a>] [actor <a href="water.html">water</a>]