Piston from EF7 Dual-Fuel Engine
Original uploaded by <a href="https://en.wikipedia.org/wiki/User:Arsi_Warrior" class="extiw" title="en:User:Arsi Warrior">Arsi Warrior</a> (Transfered by <a href="//commons.wikimedia.org/wiki/User:Finavon" title="User:Finavon">Finavon</a>)
2010-08-27
Original uploaded on en.wikipedia