RING

<P>Axial</P> <P>18≤D&lt;32;20&lt;H&lt;35<BR>32≤D&lt;250;20&lt;H&lt;45</P>

<P>Vertical</P> <P>20≤D≤60<BR>8≤(D-d)/2&lt;15<BR>25≤H≤40</P>

<P>While rare earths are found in nature naturally, they are so reactive that

they cannot be made into a usable product without a great deal of effort on the

part of scientists. As a result, they are commonly synthesized using the alloys

mentioned above, which is where the term "strong magnet" comes from.</P>