Bosed on economic comparability the consumption of materials and the price of welding and seamless pipe are compared under the different producing process.
在经济可比性的范围内，分析生产焊接钢管和无缝钢管时，各类不同工艺流程条件下的物料消耗构成和价格比较。
Bosed on economic comparability the consumption of materials and the price of welding and seamless pipe are compared under the different producing process.
在经济可比性的范围内，分析生产焊接钢管和无缝钢管时，各类不同工艺流程条件下的物料消耗构成和价格比较。
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