... hullstructural steel 船体结构钢 classification of hull steel 船体钢等级 normal strength hullstructural steel 一般强度船体结构钢 ...
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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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