短語詞組短語concave diffraction grating 凹衍射光柵holographic concave diffractive grating 全息凹麪衍射光柵concave holographic grating 凹全像光柵concave -grating spectrograph 凹麪光柵攝譜儀holographic concave diffraction grating 全息凹麪衍射光柵concave holographic grating monochromator 全息凹麪光柵單色儀concave reflection grating 凹麪反射光柵 返回 concave grating