?? ?? ???? ????? ?? ????? ??????? ?? {???????????? ???? ??? ??? ?? ?? ?????? ?????? ?? ?? ?????? ????? ?? ??? ?? ????? ???? ?? ???? ??? CHAIR FOR REPAIRING ????? ????? ???? AN ESSENTIAL TOOL ???? ?? ??? ?? WORKS IN REPAIRS . ????? ????? ???? ?? ?????? ???? ????? ? ?? ????? ??? ????? ?? ?? ??? ?? AT VARIOUS ANGLES PERFORM THEIR DUTIES. ?????