在正常操作条件下，镇静钢中没有气泡，组织均匀致密；
Under normal operating conditions, no bubble calm steel, microstructure;
组织结构均匀，内外一致，可以进行表面的雕花加工。
The structure is uniform both inside and outside, the surface can be carved processing.
组织结构均匀，内外一致，可以进行表面的雕花加工。
The structure is uniform both inside and outside, the surface can be carved processing.
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