Rectangle-shape side gate and the gear-rack taking off thread mechanism were used.

采用矩形侧浇口、齿轮齿条脱螺纹机构。

youdao

The main reason that casing falls to the hole by breaking off thread is casing thread quality can't reach the criteria, and the management of casing running into the hole is not strict.

套管脱扣落井的主要原因是套管扣加工质量达不到规范要求，以及套管入井管理不严造成的。

youdao

It's difficult to wind off all the thread.

把这些线都解开很不容易。

youdao

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That takes a lot more concentration to pull that off 10 times with the same thread -- than it does with a record like I ended up with.

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