Refining is the process of purification of a substance, usually used of a natural resource that is almost in a usable form, but which is more useful in its pure form.
The term is usually used of a natural resource that is almost in a usable form, but which is more useful in its pure form. Refining is the process of purification of a substance.
Refining is the process of purification of a substance. The term is usually used of a natural resource that is almost in a usable form, but which is more useful in its pure form.
Refining is the process of purification of a substance. The term is usually used of a natural resource that is almost in a usable form, but which is more useful in its pure form.