拍卖人对委托人交付拍卖的物品负有保管义务。
An auctioneer has the obligation of taking care of articles submitted by the trustee for auction .
信托财产的同一性，是指信托财产的范围不仅限于委托人当初交付信托的财产，凡在信托管理中所取得的一切财产也均构成信托财产。
Identity that means all property produced from trust management belong to trust property .
委托交付