翼龙类蛋化石没有显示硬壳结构，很可能同样为软壳蛋。

The pterosaurian egg doesn′t show any structures of the hard shell, indicating that it may be soft-shelled too.

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机身为半硬壳结构，轻质合金的环形隔框和纵向长桁支撑并加强了主要机身蒙皮。

The fuselage is a semimonocoque structure, light alloy circular frames and longitudinal stringers support and strengthen the main fuselage skin.

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它本身的钢皮像一个“硬壳”结构一般负载，从而降低附加的梁柱所需的成本。

The steel skin itself takes the load like a "Monocoque" structure thus cutting cost for additional columns or beams.

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