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they are placed on roadsides and they float there
I don'know came on this f*king app to find the answer 🙄😌
Diffraction gratings can be categorized into 2 types - reflection gratings and transmission gratings. So, transmission gratings are a subset of diffraction gratings. Kristian Buchwald, Ibsen Photonics
Because ino is acid wich is not needed
sand (sometimes shells)
scales or sometimes denticles
Amy I. Woods has written: 'Work on diffraction gratings'
scales or sometimes denticles
Pantelis Papadopoulos has written: 'Optical fibre holographic gratings'
Sometimes that's the case. Like "Knockin' on heaven's door", where many covers are famous.
Thermoset plastic is what valve covers are made of. Sometimes they are made of metal, but normally it is plastic.
The initial franchise fee covers various things for various franchises. Sometimes the fee covers initial marketing efforts and sometimes it just allows you to brand your business.