普通碳素钢的含硫量不大于()%,含磷量不大于()%A、0.055,0.045B、0.045,0.04C、0.05,0.06D、0.045,0,05
普通碳素钢的含硫量不大于()%,含磷量不大于()%
- A、0.055,0.045
- B、0.045,0.04
- C、0.05,0.06
- D、0.045,0,05
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