boat keel stay
... 加重龙骨 bulbkeel 龙骨支柱 boat keel stay 尾龙骨 ndme ...
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“即使在这种压力下，剑角龙骨骼中也只有一些小支柱的骨头才会断裂，而且这些骨骼很容易恢复”他说。
"Even at these forces, only a few struts of bone might break; these would heal easily," he said.
youdao
一种无支柱大棚用大棚龙骨。
The utility model relates to a greenhouse keel for greenhouse without support post.
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