铸造砂铸合金内外壁厚差
<TABLE class=table1 style="WIDTH: 392px; HEIGHT: 113px" borderColor=#b5dba2 cellSpacing=0 width=392 border=1><TBODY>
<TR>
<TD class=12bg align=middle bgColor=#e9fde4>合金类型</TD>
<TD class=12bg align=middle bgColor=#e9fde4>砂铸件内壁比外壁减少相对值(%)</TD></TR>
<TR>
<TD>铸铁 </TD>
<TD>10-20 </TD></TR>
<TR>
<TD>铸钢 </TD>
<TD>20-30 </TD></TR>
<TR>
<TD>铸铝 </TD>
<TD>10-20 </TD></TR>
<TR>
<TD>铸铜 </TD>
<TD>15-20 </TD></TR></TBODY></TABLE>
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