Meaning of Pistan musali in English. How does Piston look like

A piston is a crucial part of an internal combustion engine which transforms the gas in the vehicle into energy to drive the car forward. When one fills the vehicle with gas and turns on the engine, the gas expands, which makes the piston move and ultimately turn the wheels. Pistons are connected to crankshafts where their up and down movement is converted into rotating movement, thus powering the car to move.