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Methods: Laboratory experiment and field experiment.
方法：实验室试验和现场试验。
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The field experiment indicated that the service property of this kind of pipe is fine.
经现场试验，这种钻杆的使用性能良好。
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The field experiment indicated that the service property of this kind of pipe is fine.
经现场试验，这种钻杆的使用性能良好。
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