The measurement error of differential absorption laser radar caused by the shift of its center frequency in measuring atmosphenc density has been discussed particularly.
详细地讨论了微分吸收激光雷达测量气体密度时中心频率的漂移所引起的测量误差。
It has adopted colloid electrolyte technology, avoiding density stratification problem of acid solution and eliminating plate corrosion and passivation caused by density stratification.
采用胶体电解质技术，绝无酸液浓度层化问题，完全消除因浓度层化引起的极板腐蚀和钝化现象。
Such continued expansion has caused fall after fall into density or matter or vibration.
这样持续的膨胀导致了坠入致密、或物质、或振动的持续下降与下降。
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