? ????????? ?? ??????? ????? ????? ???????? ????????? ?????????? ?????????, ???? ?? ?? ?????? ????????? ??????? ? ???????????? ????????????????.??? ???? ???????? ?????? ????????? ????????? ?????? ???????????? ? ??????????? ?? ???? ?????? ? ???????????? ????????.[5] The definitely transportable engine was invented in 1839 by William Tuxford of Bosto