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XPD was created in 1981.
The cast of XPD - 2010 includes: Mike Goldman as Himself - Narrator
cross polarization = xpd so, xpd = 20 log E11/E12 where E11 and E12 are the two waves.
Two independent studies rated Opti-Lube XPD as the best diesel fuel additive.
The two main document formats are .xpd and .doc if u have any questions my email is herrmann.jordan@yahoo.com