Balance arm and Rocker arm

Rocker arm and balance arm are semantically related in rocker topic. In some cases you can use "Rocker arm" instead a noun "Balance arm".

Rocker arm noun - A lever pivoted at the center; used especially to push a valve down in an internal-combustion engine.

Balance arm and rocker arm are semantically related in rocker topic. You can use "Balance arm" instead a noun phrase "Rocker arm".