petroleum drill pipe
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石油供应是通过渠道或钻管螺纹。
Oil supply is made through drilled channels or pipe thread.
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可在钻井、完井、采油、修井等方面进行有效应用的可膨胀管技术，被认为是2 1世纪石油钻采行业最有前景的技术之一。
Expandable Tubular technology is one core technology in petroleum industry in 21st century, which is used in drilling, completion, recovery and workover.
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