Fig. 3 for installation hole size of the control device.

控制仪的外形图见图3，安装孔尺寸见图3。

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OCT confirmed the lack of macular hole in the control group.

对照组均由oct证实，没有黄斑裂孔的发生。

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Also it is difficult to control hole deviation.

因此，钻进效率低，回次进尺短，孔斜不易控制。

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Also it is difficult to control hole deviation.

因此，钻进效率低，回次进尺短，孔斜不易控制。

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