- double grating
- 双: two; twin; both; dual
- 光栅: raster; optical grating; gra ...
- 双光栅单色仪: double grating monochromator; doublegratingmonochromator
- 双光栅摄谱仪: double grating spectrograph; dual-grating spectrography; twin grating spectrograph
- 双光栅电视系统: dual raster television system
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