黑心可锻铸铁的石墨颗粒数分级
<TABLE borderColor=#000000 height=149 cellSpacing=0 cellPadding=1 width=451 align=center border=1><TBODY>
<TR>
<TD width=140>
<P align=center>级别</P></TD>
<TD width=45>
<P align=center>1</P></TD>
<TD width=65>
<P align=center>2</P></TD>
<TD width=65>
<P align=center>3</P></TD>
<TD width=65>
<P align=center>4</P></TD>
<TD width=45>
<P align=center>5</P></TD></TR>
<TR>
<TD>
<P align=center>石墨颗粒数/(粒/mm<SUP>2</SUP>)</P></TD>
<TD>
<P align=center>>150</P></TD>
<TD>
<P align=center>>110~150</P></TD>
<TD>
<P align=center>>70~110</P></TD>
<TD>
<P align=center>>30~700</P></TD>
<TD>
<P align=center>≤30</P></TD></TR></TBODY></TABLE>
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