Fast underground belt
The fast underground belt is the second tier of underground belts. It has a maximum underground distance of 6 tiles — 2 more than the basic underground belt. The speed of the fast underground belt is the same speed as the fast transport belt, which is twice as fast as a basic transport belt or underground belt.
Ingredients: 40× Iron gear wheel2× Underground belt
Output: 1 per craft → 30/min (single machine, no modules)
