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Law::
[قاعدة تسليم اصول اسناد] best-evidence rule : the evidentiary rule providing that for a party to prove the contents of a writing (or a recording or photograph), that original writing must be produced unless it is unavailable, in which case secondary evidence – such as copies, notes or testimony – may be admitted
فرهنگ تشریحی - کاربردی حقوق تالیف هرمز رشدیه