{
  "type": "minecraft:crafting_shaped",
  "category": "misc",
  "key": {
    "a": {
      "item": "railcraft:invar_ingot"
    }
  },
  "pattern": [
    "aaa",
    "aaa",
    "aaa"
  ],
  "result": {
    "item": "railcraft:invar_block"
  },
  "show_notification": true
}