Substances released from a foundry. This might be the non-metal mixed in a lot. But I have to have them mixed in more or less depending on the metal used in the vulcanization process.
A substance released from melting metal Which may be non-metallic mixed a lot But you also have to have the metal mixed more or less depending on the process used for melting metal
The substance that is released from the melted metal. Which might be confused with a non-metal, they are a lot, but it must be metal, they are confused, but it is a process that is used to melt metal.