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

But should note that no application of extreme bow Angle or elevation.

但须注意，不应用极度的俯角或仰角。

youdao

But should note that no application of extreme bow Angle or elevation.

但须注意，不应用极度的俯角或仰角。

youdao