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L-waveband broadband circular polarization micro-strip antenna
The invention discloses an L-waveband broadband circular polarization micro-strip antenna which comprises an upper-layer radiating antenna dielectric substrate and a lower-layer feed networkExpand
Shoe pad anti odour bacteriostatic treatment agent
An antifoul bacteria-suppressing agent for shoe pad is prepared from flavescent sophora root and alum through immesing the flavescent sophora root in water, boiling, decocting for 25-40 min, takingExpand