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It is especially suitable for drilling of hole with great slope Angle.
这是特别适合钻探孔与伟大的边坡角。
youdao
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Trying on drilling with high water level and large elevation angle;
在同一铅垂面内，当视线在水平线上方时，视线与水平线的夹角。
youdao
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Trying on drilling with high water level and large elevation angle;
在同一铅垂面内，当视线在水平线上方时，视线与水平线的夹角。
youdao