该仪器已经通过了井下试验。

This monitor had past underground experiment.

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针对井下试验中存在的问题，提出改进意见。

The improvement Suggestions were also made in accordance with the existing problems in underground test.

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通过钻杆全尺寸疲劳试验和含有缺陷钻杆的井下试验，证明了本文提出的评价方法和软件是可靠的。

Full-scale fatigue test of drill pipe and borehole tests of drill pipes containing defects prove the reliability of assessment methods and software posed in this paper.

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