The horizontal datum and two-pass statics method gave minimum depth error on time section.
试验结果表明 ,采用水平基准面两步法静校正 ,时间剖面反演深度误差最小 ;当基准面远离地表时 ,水平基准面一步法静校正也会产生较大的误差 ;非水平基准面两步法或一步法静校正 ,基准面的起伏越大 ,反演的深度误差越大 ,甚至出现构造假
This fixture should be provided with a reference leveling surface, so that it can be kept level as the balance deflects.
这种装置应该有一个水平基准面，以便在天平变形时能够使之保持水平。
at right angles to the plane of the horizon or a base line.
与水平面或者基准面成直角。
metre above Principal Datum [mPd]
主水平基准以上……米
changing the ground level to a smooth horizontal or gently sloping surface.
改变地水准平面为光滑的水平或者倾斜的表面。
The hypothetical surface of the earth that coincides everywhere with mean sea level.
大地水准面处处与平均海平面一致的大地水准面
parallel to or in the plane of the horizon or a base line.
与地平线或者基准线平行，在地平面或者基准平面上。
Automatic-leveling system for base-plane of large-size photoelectric equipment
大型光电设备基准平面自动调平系统
Geiod or quasi-geoid is a height datum for acquiring geospatial information.
大地水准面或似大地水准面是获取地理空间信息的高程基准面。
The word horizontal is applied only to the plane which is tangent to the ground-level equipotential surface.
地平面这个词则只表示与地面水准等位面相切的平面。
altitude over target
以目标平面为基准的高度
Hydropower Project Three-dimensional Standard Parts Database Based on CATIA
基于CATIA平台的水电三维标准件模板库
Adjustment Programming of Level Net on the Basis of MATLAB
基于MATLAB的水准网平差程序设计
Evaluation of True Horizontal Plane as Reference Planes under Natural Head Position
自然头位下真性水平面作参考平面的准确性评价
The piezpmetric head is also measured from the same datum level.
测压水头亦应从同一基准面算起。
Study on the Methods of Refining the Regional Quasi-geoid on the Basis of CQG2000
以CQG2000为平台的区域似大地水准面精化方法研究
The Control Standard and Method for Construction Flatness of Cement Concrete Pavement
水泥混凝土路面施工平整度控制标准及方法
Improving the Oilfield Standardization Completely by Promoting the Understanding and Raising the Starting Point
提高认识 抬高起点 全面提升油田标准化水平
Basic English level (equilvent to or above high school).
基本的英文水准（相当与或高于高中水平）。