Objective:To study the histological characteristics of osteoblast mode of pseudo growth plate in bone lengthening area.
目的：了解骨延长区假性生长板及其成骨方式的组织学特点。
The reference station needs to monitor and receive the high-accuracy navigation signal in the wide area DGPS, and to get more accuracy data of pseudo-range observation.
在GPS广域差分系统中，参考站需要进行高精度导航信号监测接收，并获得良好的伪距观测数据。
The compression in the EW direction during recent two years is more obvious than before, to south of Beijing it is the area of movement conversion and the quadrant pseudo-center of surface strain.
近两年东西向的压性作用较前明显，北京以南地区是运动的转化地区及面应变象限的准中心地区。
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