大家在查：初生木质部变态茎导管植物气孔调节茎节向重力性分生区根冠机械组织保护组织

轴伸长

轴伸长

轴伸长

轴伸长

1

B. During the heart stage leaves are initiated ; and during the torpedo stage axis elongation occurs .

心阶段启动叶；并在鱼雷阶段轴伸长率发生。

2

The shaft extension should be maintained at a safe range in order to avoid critical speed at rotor bending modes.

为了避免转子超越弯曲模态的临界转速，转子轴伸长度应控制在安全范围内。

5

Elongate along the axis of the root

沿根轴伸长

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