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tungsten (wolfram) unwrought, in powder' ex 81.02
Απορρίμματα και θραύσματα ψευδαργύρου(' ) Βολφράμιον ακατέργαστον, εις κόνιν (') Μολυβδαίνιον ακατέργαστον (') Ταντάλιον ακατέργαστον (') 'Ετερα κοινά μέταλλα ακατέργαστα (') ex 84.06
== external links ==* nonlinear wave equations by stephen wolfram and rob knapp, nonlinear wave equation explorer by stephen wolfram, and wolfram demonstrations project.
* nonlinear wave equations by stephen wolfram και rob knapp, nonlinear wave equation explorer by stephen wolfram, και wolfram demonstrations project.