datum point是什么意思 datum point怎么读
datum point的用法和样例
- The level at the reference point is zero.
参考点的电平是零。 - The point about which moments are computed need not lie on the rod.
计算力矩的参考点，并不一定要在杆上。 - The paper introduces examination methods of ground datum points.
介绍了平面基准点的检验方法。
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