Your sentences are exactly right, Alexandro. In each case what follows the comma is a list of sentence elements in apposition to each other, and that is appropriately punctuated with commas. In the first example, you have noun phrase appositives, and in the second, absolute phrases in apposition. If the items in your lists were more complex, with commas within the elements, then you might want to avoid confusion by using semicolons.
ewormuth
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