‘X’ contracts with ‘Y’ to purchase 30 chairs of a particular brand called make and type. ‘Y’ delivers 15 chairs of that quality and 15 chairs of some other make - 4sharedでダウンロード。‘X’ contracts with ‘Y’ to purchase 30 chairs of a particular brand called make and type. ‘Y’ delivers 15 chairs of that quality and 15 chairs of some other makeは、無料ファイル共有サービス4sharedで提供されています。