用正交试验方法确定包芯线的成分，使其在技术方面和经济方面能较好地满足球铁铸管生产的要求。
The technical and economical requirements for the cored wire used in nodular iron pipe production can be satisfactorily met by adopting orthogonal experimental method to determine its composition.
用正交试验方法确定包芯线的成分，使其在技术方面和经济方面能较好地满足球铁铸管生产的要求。
The technical and economical requirements for the cored wire used in nodular iron pipe production can be satisfactorily met by adopting orthogonal experimental method to determine its composition.
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