To anneal a copper gasket, you should heat the gasket（）<br>A:and quench it in oil<br>B:cherry red and quench in water<br>C:and let it cool slowly in the air<br>D:and carbonize

To anneal a copper gasket, you should heat the gasket（）
A:and quench it in oil
B:cherry red and quench in water
C:and let it cool slowly in the air
D:and carbonize

出自：海船船员证

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