China National Standards

China Normalizing annealing heavy GB Standards List

  •  China "Normalizing annealing heavy" GB Standards List:
    • Standard  Code Standard Title Standard Class Order
    GB/T 37559-2019 Normalizing and annealing of heavy steel forgings
    大型锻钢件的正火与退火    		 China National Standards
    Normalizing annealing heavy
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