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1.0330 Q345 S235JRG2 1.5067合金结构钢USt34-2 SGD400D SCM415
1.0330 Q345 S235JRG2 1.5067合金结构钢USt34-2 SGD400D SCM
42crmos4v合金结构钢A850FS调质圆钢SAE4140H板材SGD400D SS400B
