Potential answers for "Refinery input"

⭐⭐⭐⭐ ORE
⭐⭐⭐⭐ OIL
⭐⭐⭐⭐ PIGIRON
⭐⭐⭐⭐ ORES
⭐⭐⭐ CRUDE
⭐⭐ SMELTER
⭐⭐ SLAG

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