卷材屋顶防水层在转角处、变形缝、穿墙管道等部位做法必须吻合设计要求。
The practice of waterproof layer in the corner, wall cracks, pipeline and other parts must meet the design requirements.
介绍了一种利用光栅的多缝衍射分光代替传统转角法的角度测量的微透镜焦距测量方法。
A new method of microlens focal length measurement by rotation method based on grating diffraction is introduced.
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