Structural steel material of main hull structure to be of the quality as required by the Classification Society and shall be free of cracks, lamination, surface defects and other defects.
主船体结构用钢的材料须满足船级社要求，并且无裂纹、迭片结构、表面缺陷和其他的缺陷。
Structural steel material of main hull structure to be of the quality as required by the Classification Society and shall be free of cracks, lamination, surface defects and other defects.
主船体结构用钢的材料须满足船级社要求，并且无裂纹、迭片结构、表面缺陷和其他的缺陷。
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