Normally people say anything that has a bunch of gears on it is what a steampunk machine is but that is not the case. A steam punk ]machine has to work on steam and gears. During the steampunk era air balloons were made. Then things like the Blimp and the Zeppelin came shortly after.
Anything that is a concentrated column of light can be a laser. You might not notice but lasers are everywhere in doctors offices. Doctors and dentists use lasers all the time to preform surgeries and remove teeth. Although most laser are used by the military to guide missiles and rockets.
Tanks are very interesting machines they were created in world war 1 by the British. Tanks were originally made to take down the soldiers that dug trenches in the war. Although now they mostly just fight other tanks. Germany also followed shortly after Great Britain in building tanks.
This is an article about sonic weapons a elevator in a regular building was bent a little near the fan which acted like a sonic weapon. Because this is such a strange thing for noise to be able to affect people. It went under investigation by the military and navy. The best scientist to work on this was Vladimir Gavreau