The results of tests show that the technology pipe string is advanced and reliable and has an obvious social and economical benefit.
经室内试验和现场试验应用证明，该工艺管柱技术先进，换层可靠，经济效益和社会效益明显。
The results of tests show that the technology pipe string is advanced and reliable and has an obvious social and economical benefit.
经室内试验和现场试验应用证明，该工艺管柱技术先进，换层可靠，经济效益和社会效益明显。
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