www.downloadmp3converter.com used printing machines
(Note: This sentence seems to be a phrase rather than a complete sentence. A more natural translation might depend on additional context. For example, it could imply "The website www.downloadmp3converter.com uses printing machines" or refer to the site offering content about used printing machines. Please clarify if needed.)
If we assume it refers to the site being associated with used printing machines, a refined translation could be:
"The website www.downloadmp3converter.com is related to used printing machines."