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| 球化退火; 球化退火 (The heat-treatment processes of steel parts include hardening, annealing, normalizing, spheroidizing annealing, stress-relief annealing and case hardening. 钢质零部件的热处理法包括：淬火、退火、正火、球化退火、去应力退火和表面硬化等。) | |||
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| 球化退火 | |||
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| 球化退火 | |||
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