Moreover, the difference of the internal precipitation method and the external adding method for the second phase particles in steel was generalized.
同时，对钢中第二相粒子的内部析出法和外部加入法的差异做了简单的概述。
The propagation velocities of the two orthogonally polarised modes in a "polarisation-maintaining" fiber are changed when exposed to external fields resulting in phase difference.
保偏光纤中两正交偏振模受外场作用，其传播速度发生变化，形成相位差。
The propagation velocities of the two orthogonally polarised modes in a "polarisation-maintaining" fiber are changed when exposed to external fields resulting in phase difference.
保偏光纤中两正交偏振模受外场作用，其传播速度发生变化，形成相位差。
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