Thus, stable hole, smooth drilling and tripping operations and zero outage time have been obtained in the construction period.

使该井在施工期间，井壁稳定、起下钻井眼畅通，全井事故、复杂时效均为零。

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It had taken the cook, the stable boy, and both of the twins to drag the chests into the yard, where a great hole had been dug under the flagstones close to the servants' latrines.

两个箱子被厨师、马童和一对双胞胎齐力拖进了园子石板路的大洞里。这大洞的旁边，就是仆人的厕所。

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On the one hand, the plane positioning is stable and reliable, on the other hand, it is easy to process holes on the machined surface, and can improve the machining accuracy of the hole.

一方面，平面定位稳定可靠，另一方面，在加工过的平面上加工孔比较容易，并能提高孔的加工精度。

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