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Rust converter and piece of metal. Treatment and protection of metal surfaces before painting. Chemical rust remover and brush
Microswitches on the green PCB from the frequency converter.
A catalytic converter (catalyst) installed on a modern car. Equipment for reducing harmful emissions into the atmosphere.
Close up old catalytic converter in hand Car service man remove from engine gasoline car dust clogged condition on filter in service concept and engine room in the background
residential solar photovoltaic system. PV converts sunlight directly into electricity. Solar cells. Beautiful house with solar panels outdoors. Real estate for rent.

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