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Diffractive-optical element, scanning optical system, optical scanner, and image forming apparatus.
光学衍射元件，光学扫描系统，光扫描器和图像形成装置。
youdao
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Diffractive-optical element, scanning optical system, optical scanner, and image forming apparatus.
光学衍射元件，光学扫描系统，光扫描器和图像形成装置。
youdao