horizontal and vertical reference points 平面及高程参考点
ship vertical reference 船用铅垂参考仪
vertical reference line [测] 垂直基准线 ; 垂直参考线
Vertical Reference Lines 垂直参考线
vertical reference surface 垂直基准面
vertical reference unit 垂直陀螺基准组件
vertical reference point 垂直参考点
local vertical reference 局部垂线基准
vertical reference system 垂直参考系统
Some key techniques, such as attitude correction, quality control of GPS height, transformation of vertical reference datum and extraction of tidal level, are studied in detail.
这些关键问题主要有姿态改正、GPS高程质量控制、垂直基准转换、基于信号的在航潮位提取。
These can be "dragged out" of rulers, providing a vertical or horizontal line to reference as you place components on the workspace.
可以从标尺“拖出”这些线，作为在工作区上放置组件时的垂直或水平参考线。
The gyro vertical utilizes a gyroscope as an integrating device to obtain the average position of a pendulous gravity reference .
垂直陀螺利用一个陀螺仪作为积分装置以得摇摆不定的重力基准线的平均位置。
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