Miners

They dig and collect stones and minerals then send it to factories.

What they do during the day: Wagons (towed by two humans) can carry minerals and stones to factory.
 * 1) Stones: Use to build houses and administrative buildings
 * 2) Iron: Use to create some weapons, tools and the outside of machines
 * 3) Gold: Very rare ore, use to build the inside of machines
 * 4) Silver: Very rare ore, use only to create jewellery.

Mechanical arms are used to dig faster, they are handled by four humans.