formal or informal

[sky753]

Hello Everyone,

I would like to know here if attributive clauses are usaully used in formal styles?

For example, in the following sentences, if its are more inforaml than whose( when replaced)

The raw materials are grinded by the open MLS3636 vertical mill. Its drying sources originate from the waste gas exhausted from the preheater.

Regards

Sky

[Koronas]

Formality is not (in my opinion) affected by the use of "whose".