Translations:GregTech 5/Mining and Processing/658/en

Steam Processing
Once you have enough Bronze to start making steam machines, you can make a to produce 2 Crushed Ores per ore block. This is your basic source of ore doubling. The Steam Macerator does require 2 Diamonds to craft though, so you may want to bypass it at first and just make a to at least get your Bronze supply rolling. Additionally, the functions as a  for Ore and Crushed Ore smashing, and if used can reduce the number of Hammers you need to craft.