环形子孔径法是一种无需辅助元件就能实现对大口径、大相对口径非球面检测的“柔性”测试技术。

Annular subaperture test method has been developed for low cost and flexible measurement of large, fast aspheric surfaces without any special elements.

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针对口径上的差异，对建筑产品工程实际成本与预算成本项目如何调整进行了探讨，并提出改进的建议。

Judging from this, the way of the adjustment of the actual and budget cost items of construction projects is discussed, and Suggestions for improvement are put forward.

youdao

针对口径上的差异，对建筑产品工程实际成本与预算成本项目如何调整进行了探讨，并提出改进的建议。

Judging from this, the way of the adjustment of the actual and budget cost items of construction projects is discussed, and Suggestions for improvement are put forward.

youdao