Nutcracker has threaded rod which passes through bore in top of steel ring and is screwed down to squeeze nut between plate on its base and inner surface of ring
摘要
<p>The nutcracker has a threaded rod (4) which passes through a bore in the top of a steel ring (1). This is screwed down so that the nut is squeezed between a plate (5) on its base and the inner surface of the ring.</p>
