auxiliary datum plane 辅助基准面
erection datum plane 安装基准面
tidal datum plane [海洋] 潮汐基准面
datum plane for sounding 基准水平面
datum plane for construction 施工基准面
floating auxiliary datum plane 浮动辅助基准面
standard datum plane 标准基准面
datum plane of gauge 测站基面
N the horizontal plane from which heights and depths are calculated 基准面 [surveying]
In this paper, the geometric characteristics of worm drive with double enveloping arc surface machined by datum-plane tool are stated.
本文阐述了平面二次包络弧面蜗杆传动的几何特征，引用数学方程对这些特征加以说明，进而提出了啮合参数选择原则。
Perpendicularity - is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis.
垂直度-条件是表面，轴，或线，这是90度的基准平面或基准轴。
With the idea of the datum plane linking the two shops at a higher level, the shops are actually conceived as separate and independent entities on the ground.
基准面在更高的层层连接这两个商店的概念，而在地上作为单独的实体商店。
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