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United Scientific DFG300 Diffraction Gratings for SPECT02 Intermediate Spectrometer auspowers_batchsix Teach your child to care dingo Teach your child to care for our earth while saving your family money on disposable paper napkins The cable does not require any driver or program measures 45mm x 60mm (H x W) Replacement diffraction grating with 300 lines per millimeter splits light into multiple beams for analysis in light and optics experiments
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