optical teaching experiment--我搜100

$Diffraction grating 600lines 1mm Optical teaching experiment Transmission grating Spectrophotometer Customizable$

👍: 0.0%

$7.2

14.40

$Holographic diffraction grating 36x38mm 600 lines 1mm grates Optical teaching experiment Transmission grating No shell$

👍: 100.0%

$7.2

14.40

$Diffraction grating 300 lines 1mm Optical teaching experiment Transmission grating Spectrophotometer Customizable$

👍: 0.0%

$7.2

14.40