The post-processor plug-in approach is a bit more difficult to master, but more powerful than the context variable method.
后处理器插件方法有点更难于掌握，但是比上下文变量方法更强大。
The technology to make a large area master with the grating of optically variable device (OVD) is role in holographic image embossing.
制作具有光变图像（OVD）光栅条纹的大面积全息原版，是激光图像无油墨印刷的核心技术之一。
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