Do you know how many thousands of credits it costs every time those energy cannon are fired?

The falling tree almost accomplished what the energy cannon could not.

No big deal with the kind of energy cannon they were using.

Fortunately energy cannons don't work any better than regular ones when the barrel is full of sand.

Several dozen Cardassian soldiers seemed to be setting up an energy cannon.

The leader arrowed in at the Earth craft, opening up with energy cannon.

Further, the energy cannon itself could not be removed without tools.

A small energy cannon with a 360 action radius offered protection against attack.

Armaments include an energy cannon on each shoulder and a force field.

A single word and the energy cannons would concentrate their firepower, on the enemy.