黑心可锻铸铁的表皮层厚度分级
<TABLE borderColor=#000000 height=111 cellSpacing=0 cellPadding=1 width=362 align=center border=1><TBODY>
<TR>
<TD width=100>
<P align=center>级别</P></TD>
<TD width=50>
<P align=center>1</P></TD>
<TD width=70>
<P align=center>2</P></TD>
<TD width=70>
<P align=center>3</P></TD>
<TD width=50>
<P align=center>4</P></TD></TR>
<TR>
<TD>
<P align=center>表皮层厚度/mm</P></TD>
<TD>
<P align=center>≤0.1</P></TD>
<TD>
<P align=center>>1.0~1.5</P></TD>
<TD>
<P align=center>>1.5~2.0</P></TD>
<TD>
<P align=center>>2.0</P></TD></TR></TBODY></TABLE>
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