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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
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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