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标题: 求助灰铁问题. [打印本页]

作者: pinesky 时间: 2008-7-11 09:22
标题: 求助灰铁问题.
向各位大侠求助:
本人有一个英文的材料标准( 灰铁)的材料,里面有一段话不知道何意, 请大家帮忙看一下.
Castings shall be free from primary carbide and of close grained iron such as to give the required machinability and surface finish.

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