Das ist eine Betonpumpe mit Betonmischer in Arbeit 

I love your model of concrete pump and mixer, do you have more? I am Peruvian and since I was little I liked those models (Me encanta tu modelo de bomba y hormigonera, ¿tienes más? Soy peruano y desde pequeño me gustaron esos modelos)😎😍😊😉😉👍🏻👍🏻👍🏻 excellent

Nice

God I miss that sound

where did you buy it friend?

This is junjin sound