Specification for plain end seamless and electric - resistance - welded steel pipe for high - pressure pipe - type cable circuits 高压管型电缆线路用平端无缝与电阻焊钢管规范
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Standard specification for plain end seamless and electric - resistance - welded steel pipe for high - pressure pipe - type cable circuits 高压管型电缆线路用平端无缝与电阻焊钢管的标准规范