球化级别
<TABLE borderColor=#000000 height=114 cellSpacing=0 cellPadding=1 width=554 align=center border=1><TBODY>
<TR>
<TD width=116>
<DIV align=center>级别</DIV></TD>
<TD width=68>
<DIV align=center>3级</DIV></TD>
<TD width=68>
<DIV align=center>4级</DIV></TD>
<TD width=68>
<DIV align=center>5级</DIV></TD>
<TD width=68>
<DIV align=center>6级</DIV></TD>
<TD width=68>
<DIV align=center>7级</DIV></TD>
<TD width=68>
<DIV align=center>8级</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>石墨直径(100×)</DIV></TD>
<TD>
<DIV align=center>>25~50</DIV></TD>
<TD>
<DIV align=center>>12~25</DIV></TD>
<TD>
<DIV align=center>>6~12</DIV></TD>
<TD>
<DIV align=center>>3~6</DIV></TD>
<TD>
<DIV align=center>>1.5~3</DIV></TD>
<TD>
<DIV align=center>≤1.5</DIV></TD></TR></TBODY></TABLE>
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