Invention Grant
US07992550B2 Exhaust gas recirculation valve 有权
排气再循环阀

Exhaust gas recirculation valve
Abstract:
An inner surface of an exhaust gas passage 22 of an EGR valve 11 is coated with Teflon coating 31 and a surface of a valve rod 25 is coated with a film 32 of chromium plating.
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