??? ? ?????? ????? ????? ??????? ????? ????? ????????? . ??? ?????? ?? ??? ??????? ???? ???? to ensure ???? satisfactory state ????? ?????? ?? use. Maintenance of Luggage includes ????? ??? ??????? { ????? ?? ??? ?? the bags { ??? wheels ????? ????? ???? ??? ?????? also ????? ??? ??????? ?? ???? proper maintenance of luggage ????