11. Usecase á¿ðýëäýõ¿¿í õýñýã: Actor Check Price Purchase PC Manage Inventory Shop keeper <<include>> Customer А ctor: системийн эцсийн хэрэглэгч .
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13. Place an order Check Price <<include>> Customer Place a mail order <<extend>> <<extend>>: ªºð usecase-èéã ºðãºòãºõ <<include>>: ªºð usecase-èéã àøèãëàõ ýñâýë àãóóëàõ USECASE- д дүрслэгдэх холбоосууд
14. Usecase òîäîðõîéëîëò 1 Overview 2 Eventflow 3 Relationship 4 Preconditions 5 Other information Usecase òîäîðõîéëîëò íü äàðààõ õýñã¿¿äýýñ á¿ðääýã.