实际上浮动基准面还是水平基准面，只是不同CMP的水平基准面高程可以变化。

Actually, floating datum is still horizontal datum, but the datum elevation of different CMP is variable.

youdao

实际上浮动基准面还是水平基准面，只是不同CMP的水平基准面高程可以变化。

Actually, floating datum is still horizontal datum, but the datum elevation of different CMP is variable.

youdao