 ያልተጣራ ትልቅ ቁርጥራጮች አንዴ የተሰበረ ነው, ከዚያም ዝቅተኛ ቦታ ላይ ይወድቃሉ (አሁን ያነሱ ናቸው ምክንያቱም) እንደገና የተሰበረ ቦታ.
Large pieces of ore are broken once and then fall to a lower position (because they are now smaller) where they are broken again.