We found one dictionary that defines the word .3gr files:

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1. .3GR files: Computer Telephony & Electronics Dictionary and Glossary

▸ Words similar to .3gr files ▸ Usage examples for .3gr files ▸ Idioms related to .3gr files ▸ Wikipedia articles (New!) ▸ Words that often appear near .3gr files ▸ Rhymes of .3gr files ▸ Invented words related to .3gr files