由热浸酸内外表面防腐处理。

Inside and outside surface anti-corrosion treatment by hot dipping acid.

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以内外表面为边界面，构造复杂的船舶壳体。

The complex shell is constructed in inside and outside surfaces as boundaries.

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以内外表面为边界面，构造复杂的船舶壳体。

The complex shell is constructed in inside and outside surfaces as boundaries.

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