1、? Pure, tough and concentrated substances by burning or heating: steelmaking, coking, oil refining, condensed milk, purgatory and tempering.

2, burning: real gold is not afraid of fire.

3. Deliberate: Refine words.

4. Last name.

Refined words

How steel is made, purgatory, alchemy, condensed milk, exercise, alchemy, tempering, tempering, steelmaking, refining, refining, tempering, smelting, alchemy, smelting, real gold is not afraid of fire, ironmaking, and smelting into steel.

Chinese idioms, Chinese characters, trials, oil refining, refining, coking, steelmaking, medicine refining, gas refining, refining, honey refining, physical exercise, bone refining, plastic refining, copper refining, fire refining, teacher refining, mountain refining, calcination refining and coking furnace refining.