... directional steering control；转向控制 directional stem；操向杆 directional switch；操向开关 ...
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Conclusion NGF could induce directional migration of neural stem cells.
结论NGF有诱导神经干细胞定向迁移的作用。
To study nerve stem cell directional differentiation to cholinergic neuron by adjusting action of promote differentiation factors.
目的通过促分化因子的调节作用对神经干细胞向胆碱能神经元的定向分化进行探讨研究。
The rotary drill stem will engender direction drift in rotary drilling of directional well and cluster well.
在定向井及丛式井的转盘钻进中，旋转钻柱会产生方位漂移。
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