The paper involves an investigation into the new steel pipe manufacture technology of roller die drawing with the two-stand Y type three-high mill.
研究了利用二连式Y型三辊辊模拉拔钢管生产新技术。
The paper involves an investigation into the new steel pipe manufacture technology of roller die drawing with the two-stand Y type three-high mill.
研究了利用二连式Y型三辊辊模拉拔钢管生产新技术。
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