In the axial systems, the phloem consists of sieve cells, phloem parenchyma cells, albuminous cell and phloem fibers. In the radial systems, it consists of phloem rays.
轴向系统由筛胞、韧皮薄壁组织细胞、蛋白细胞和韧皮纤维组成，径向系统由韧皮射线组成。
2
Furthermore, incentive and response technology of the tracer was used to study the axial backmixing of the liquid in different structure cell.
同时，使用示踪激励响应技术，研究了不同结构单元的轴向返混情况。
3
The O-cell pile testing (OPT) method is a new axial static load test of pile.