????? ??? ?????? ??? ????? ?????? ???? ????? ?? ????? ????? ??????? ?? ?????? ??? ?????? ??? ?????? ?????? ?????.six – The opportunity to teach the trainees to use the upkeep and mend manuals in an advanced civilized way.???? ??? ??????? ??????? ????????? ?????? ???????? ????? ??????? ?? ???????? ???????.?? ??? ????? ???????? ?????? ???? ?? ????