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。
It has obvious technical, economical and safety advantages over the traditional method of producing potassium tert butoxide from metallic potassium.
它比传统金属钾制取叔丁醇钾有明显的技术、经济、安全优势。
But the current methods are quite limited, and the result of technical and economical evaluation of ship depends on the chosen method too much, so some farther research is needed to do.
但现有方法还非常有限，导致船舶技术经济论证的结果过分依赖所选择的方法，因此有必要做进一步的研究。
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