(~s)
A ~ is a device that contains a disc turning on an axis that can turn freely in any direction, so that the disc maintains the same position whatever the position or movement of the surrounding structure.
N-COUNT
(~s)
A ~ is a device that contains a disc turning on an axis that can turn freely in any direction, so that the disc maintains the same position whatever the position or movement of the surrounding structure.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012