?? ?? ??????? ????? ?? ????? ??????? ?? {???????????? ???? ??? ??? ?? ?? ?????? ?????? ?? ?? ??????? ????? ?? ??? ?? ????? ???? ?? ???? ??? REPAIR WORK CHAIR ????? ????? ???? ?? ????? ????? ???? ?? ??? ?? IS INVOLVED IN REPAIR WORKS. ????? ????? ???? ?? ?????? ???? ????? ? ?? ????? ??? ????? ?? ?? ??? ?? ?? ?????? ??? ????? PERFORM THEIR DUTIES