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Blackening Coating: Cold water cleaning: rinse with flowing clean water. Pickling: wash with hydrochloric acid solution at room temperature for no more than 30 seconds. Blackening (put the blackening liquid in a ...

Automotive CNC Machining: We provide OEM / ODM incremental services and supporting services for customers to grow together according to the customer characteristics of the automobile industry (mass production), rather than ...

Blackening Coating: minutes at 80~100 ℃. Cold water cleaning: rinse with flowing clean water. Pickling: wash with hydrochloric acid solution at room temperature for no more than 30 seconds. Blackening (put the ...

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Blackening Coating