- 11
- Sep
Holographic diffraction grating for teaching 1.3 usd/pc 600 lines 300 lines 100 lines 50 lines in china
имаме най -доброто производство на холографска дифракционна решетка в Китай
600 lines 300 lines 100 lines 50 lines for 1.3usd/pc
the size is 36mm x 38mm
