http://tinyurl.com/qbe675l

I would divide kurz vs pył by size or even origin.

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Note added at 18 mins (2014-10-03 16:54:17 GMT)
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Kurz comes from foreign sources/contaminants often whereas pył can be intrinsic to the given process.

dust & grit:

https://www.google.pl/webhp?sourceid=chrome-instant&ion=1&es...

"(...) this is dust and grit on our table (...)"

"How easy does dust and grit get between the metal sides of the phone and the case, causing marks like (...)"





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Note added at 18 mins (2014-10-03 16:54:11 GMT)
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"Common complaints relate to dust and grit arising from construction sites when renovation work is taking place."

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Note added at 22 mins (2014-10-03 16:57:38 GMT)
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"AIR POLLUTION CONTROL (DUST AND GRIT EMISSION) REGULATIONS"

"The study examined the relationship between particle size in the dust and grit size of the abrasive."

"But little by little, there crept into my life the dust and grit of the journey."

Najważniejsze oczyścić Podstawową czynnością rozpoczynającą prace przygotowawcze jest dokładne oczyszczenie i umycie maszyn i narzędzi rolniczych. Umyć i oczyścić należy wszystkie podzespoły, zwracając szczególną uwagę na te, które w czasie pracy ulegają silnemu zanieczyszczeniu, np. zespoły robocze maszyn uprawowych, do nawożenia, chemicznej ochrony roślin, przenośniki w maszynach do zbioru okopowych. Pozostawione maszyny i narzędzia z oblepioną glebą szybciej korodują. Nawet kurz lub pył, pozostający na konstrukcji maszyny przyczynia się do korozji, gdyż łatwiej wchłania wilgoć z powietrza. - http://docs4.chomikuj.pl/503557665,0,1,29.pdf

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Few products are absolutely maintenance-free and all Steel & Tube profiles are subject to the cumulative effects of weather, dust and other airborne deposits, some of which are extremely aggressive. - http://steelandtube.co.nz/system/files/resource/S&T_Roofing_...

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The factory applied finish of Signature®200 is baked-on coating designed to give trouble-free performance for years with little service required. However, mild detergents and/or mineral spirits are recommended for removal of surface dust and airborne chemical deposits. - http://goo.gl/PP6aPM

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Maintenance
Few products are absolutely maintenance-free and all are subject to the cumulative effects of weather, dust, salt and other airborne deposits — some of which are extremely aggressive. - http://www.mjlroofing.co.nz/upl/website/contact/spoutingfasc...

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our products keep your surfaces new , shiny , and healthy by repelling water, dust, and environmental contaminants that cause corrosion, oxidation, and staining. - https://www.facebook.com/diamondsealsystems/info

propozycja

They are both dusts, no matter where they come from.

np.
"Airborne contaminants can occur in the gaseous form (gases and vapours) or as aerosols, which include airborne dusts, sprays, mists, smokes and fumes. Airborne dusts are of particular concern because they are associated with classical widespread occupational lung diseases"
http://www.who.int/occupational_health/publications/airdust/...


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Note added at 2 days9 hrs (2014-10-06 01:37:55 GMT)
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dalej w tym samym linku:
"Definitions and examples
Dusts are solid particles ranging in size from below 1 µm up to around 100 µm, which may be or become airborne, depending on their origin, physical characteristics and ambient conditions"

a tu bardziej szczegolowa klasyfikacja pylow (classification of dusts)
http://books.google.co.nz/books?id=02ErAAAAYAAJ&pg=PA9&lpg=P...