plane datum points 平面基准点
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
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。
Currently available vernier depth gauges are simple in measuring function, especially in measuring precisely the no touchable directly depth of the measuring datum plane.
现有游标深度尺的功能单一，对测量基准面无法直接触碰的深度尺寸难以精确测量。
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