( BrE ) ( NAmE jack·ham·mer ) noun
a large powerful tool, worked by air pressure, used especially for breaking up road surfaces
( BrE ) ( NAmE jack·ham·mer ) noun
a large powerful tool, worked by air pressure, used especially for breaking up road surfaces
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005