gray iron bar

This paper analyses the band structure with nodular graphite that was first found on the cross section of the gray iron bar in the experiment.

通过试验分析，首次在灰铸铁型材断面上观察到球状石墨的带状区，并对这种带状组织及成因进行了分析探讨。

Based on production practice, the continuous casting process of high phosphorus gray iron bar sections and their structures as well as properties was investigated.

通过生产实践，探索了高磷连铸灰铸铁型材生产工艺及组织性能特点。

Half on the road, he met a gray-haired old lady sitting in a small river, exert herself grinding a thick iron bar.

半路上，他遇到一位白发苍苍的老婆婆，坐在小河边，用劲磨一根碗口粗细的铁棒。