The LF refining process of oil casing steel at some steel work was investigated.
对国内某钢厂生产石油套管钢的LF精炼工艺进行了研究。
So we are talking a lot of steel casing here.
因此我们说道的此项技术需要使用大量钢材。
In the casing surface spray treatment, stainless steel box cover.
机壳表面喷塑处理，不锈钢箱盖。
In the casing surface spray treatment, stainless steel box cover.
机壳表面喷塑处理，不锈钢箱盖。
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