Through the above craft guaranteed that the oil extraction rod has the good overall performance.
通过上述工艺保证抽油杆具有良好的整体性能。
And has analyzed the reason which the wire rod performance non-uniformity produces.
分析了线材性能不均匀性产生的原因。
And has analyzed the reason which the wire rod performance non-uniformity produces.
分析了线材性能不均匀性产生的原因。
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