?? ??? ?????? ?? ???? ?? ???? ??? ? ??? ????? ?????? ???? ???? ???? ??? ? ? ????.???? ???? ?? ??? ??? ? ?? ??? ???? ??? ? ??, ? ?? ??? ??? ??.?? ???? ?? ???? ?? ???? ??? ?? ? ?? ???????? ????? ?? ? ??????? ??? ???? ??, ??? ??? ??? ???? ????~??? ???? ?? ??? ??? ???? ??? ???? ?? ????? ????? ???????? ?? ?? ???? ???? ??? ??, ??? ??? ?? ??? ???.?? ?? ??

?????? ???????! ????? ????? ?????? ????? ?????? ????? ?????? ??????. ???? ???? ???? ?? ??…???? ????? ????? ????? ????? ?????? ????? ?? ???? ?? ??????? (?????? ??????) ????? ? ????? ???????. ?????? ????? ?????? ????? ??????? ?????? ?????.??? ????: ????? ????? ?????. ????? ????? ??? ???? . ??????? ?????.  ????? ????????? ??????.???? ????: ?????

. The knot is really a alternatively historical device of velocity utilized for centuries by sailors and at the time measured by timing a knotted rope as it had been decreased more than the aspect of the ship into your flowing sea.Numerous forms of energy plant are used to push propellers. Early airships utilized gentleman ability or steam engines.