octagonn.八边形;八角形
Octagonal ring八角环
octagon hammer八角锤
octagonal coil去磁线圈
octagonal well八角井
octagonal pier八边形墩
octagonal drum八角鼓
octagonal dome八角穹顶
octagonal site八面体晶位
octagon column八面柱
octagonal shaft八角钻杆