双韧管状中柱

  • 网络amphiphloic siphonostele

双韧管状中柱双韧管状中柱

双韧管状中柱

amphiphloic siphonostele

很有用... ... 双面夹角||dihedral angle 双韧管状中柱||amphiphloic siphonostele 双韧型维管束||bicollateral vascular bundle ...

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