How to call the tender unit to get information?

Call the tendering unit to consult technical parameters for information. Call to ask about things other than bidding, and say that I really want to participate in the bidding organized by the bidding company. I don't know whether the technical parameters of the bidding are suitable for our own technical parameters, but I want to ask about the general indicators and requirements of the technical parameters, so as to avoid wasting manpower and financial resources when I see that I can't meet the requirements of the bidding documents after buying the bidding documents.