concave plane

Structural Design of a High-rise Building with Concave Plane

上南花苑城D区平面不规则高层建筑结构设计

The beam sizes reflected from the concave mirror and the plane mirror are 48 mm and 5.1 mm, respectively. The angle adjusting precision of the plane-concave resonator is 3.18 ′.

得到由凹面镜和平面镜反射回来的光斑直径分别为4.8mm和5.1mm，平凹腔的角度对准精度达到了3.18′。

Practical application showed that the improved crystallizers solved the problems such as concave big plane and flat side plane of the ingot successfully, and thereby the producing rate was enhanced effectively.

实践证明，对结晶器的改进，成功地解决了扁铸锭大面凹、小面分层的问题，提高了铸锭铣面成品率和热轧成品率。

An approximate analysis on concave ( plane) GRATING-MIRROR stable resonator

凹（平）面衍射光栅稳定共振腔的近似分析

There are six various plane and concave-convex lens.

备有六种不同面型和凹凸透镜.