?rolley???? ??? ??? ?????/?????/???? ??????? ? ????? ?? ????? ?????/????? ???????/?????? ?? ?? ?????. ??? ????? ?? ?? ???/??????/??????? ???? ?????? ?? ?? ???? ?? ???? ???? ????/????/???? ?????. Trolley???? ??? ??? ?? ??????? ?? ???? ???/???/?????? ? ??????/???/????? ?? ?? ?? ????? ?????/ categorize into different types/ ???? ???? ???. ?rolley ???