... toughness grade of hullstructural steel 船体结构钢韧性等级 normal strength hull structural steel 一般强度船体结构钢 structural steel hull 钢结构船体 ...
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Hull structural steel 船体用结构钢
steel structural hull 钢结构船体
high-strength hull structural steel [船] [材] 高强度船体结构钢
high strength hull-structural steel 高强度船体结构图
normal strength hull structural steel 一般强度船体结构钢
hull-structural steel [船] 船体结构钢
forged steel for hull-structural 船体结构用锻钢
toughness grade of hull-structural steel 船体结构钢韧性等级
B hull structural steel B级船板钢
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