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。
The device can move the seal part from the bottom hole to the wellhead.
该工具将密封部位由井底移至井口，适用于各种规格的大直径套管固井。
The zigzag blade is adopted. A hole punching device can be equipped as an option.
采用锯齿形刀片，同时可配打孔装置。
The zigzag blade is adopted. A hole punching device can be equipped as an option.
采用锯齿形刀片，同时可配打孔装置。
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