amphivasal concentric vascular bundle外木包围维管束;周木维管束
ectoxylar concentric vascular bundle外木质包围维管束
ectophloic concentric vascular bundle外筛包围维管束
amphicribral concentric vascular bundle双韧同心维管束
concentric vascular bundle[植] 同心维管束;包围维管束;同心维管束
ectoxylar concentric bundle周木维管束;外木包围维管束
amphivascal concentric bundle周木维管束