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<tr valign="top"><td valign="baseline" nowrap><i>unit-instance</i></td><td valign="baseline">&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign="baseline"> A <a href="ref-glossary.html#id256">unit&nbsp;instance</a> (or <a href="ref-glossary.html#id222">space&nbsp;instance</a>)
</td></tr><tr valign="top"><td valign="baseline" nowrap><i>streamer</i></td><td valign="baseline">&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign="baseline"> A <a href="ref-glossary.html#gl:streamer">streamer</a>
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