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提问人:网友douliyoutang1
发布时间:2022-01-07
[主观题]
含硫、磷量较低称为()。
A、普通碳素钢
B、优质碳素钢
C、高级优质碳素钢
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
查看官方参考答案
A、普通碳素钢
B、优质碳素钢
C、高级优质碳素钢
A、0.055,0.045
B、0.045,0.04
C、0.05,0.06
D、0.045,0.05
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