concave diffraction gratingconcave gratings凹: low-lying area; depression光栅: raster; optical grating; gra ...凹光圆盘: concave disk光栅: [电子学] raster; optical grating; grating; pattern白光栅: white raster下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:凹光栅，即可在微信中查询翻译
