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cyanide hardening
auto.	氰化
el.	氧化硬化
shipb.	氰化硬化
cyanide case hardening
met.	氰化热处理; 氰化淬硬
cyanide-hardening
met.	氰化硬化

cyanide- hardening: 1 phrase in 1 subject

Metallurgy

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