- carbon co tructional round steel
- carbon constructional round steel
- carbon constructional steel round
- 碳素: carbon
- 结构: structure; composition; cons ...
- 圆钢: round bar steel; steel rod
- 碳素结构钢: carbon co truction steel; carbon co tructional steel; carbon construction steel; carbon constructional steel; carbon structural steel
- 碳素结构方钢: carbon structural square steel
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