Anyway, I still do not understand why it makes no sense. What if I put a single article at the beginning? How can the meaning be lost in that case? If the meaning is lost because of the abbreviation (PCU=Power Conversion Unit), it seem to be a different case, which has nothing to do with the use of articles.
Or maybe in terms of grammar I should determine each noun on the list in this kind of phrase?
I understand the use of both the definite and indefinite articles and what effect it has on the meaning of the sentence. My question is about the need to determine each noun on the list of the kind rather than use a single article at the beginning of the list to determine all the items at once.
So, can I use a single article at the beginning to determine all the items on the list of the kind?