Lamination teaching's protophase adequate preparation and scientific management after delamination are the keys of the modes can success and having good teaching quality.
分层教学的前期充分准备和分层后的科学管理是该教学模式成功及教学质量保证的关键。
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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