Hole on the surface is very smooth.

表面上的孔是非常光滑的。

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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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The fatigue behaviours of Superalloy GH901 under major combined with minor cycle have been systematically studied at room temperature using smooth specimen and sheet with center hole.

采用光滑圆棒和中心孔板片试样，对GH901合金室温高低周复合疲劳进行了系统的研究。

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Using the former, players smooth a path from near their ball to the hole, and place their ball in the path to putt, making sure that the distance to the hole is the same as from their original lie.

WSJ: Sand-Greens Golf: A Game Lives On in the Great Plains