A screw gear type differential mechanism includes a differential carrier, an operculum, a main reducing gear driven gear, left and right half axis gears, etc.

本螺旋齿轮式差速器，包括有差速器壳、壳盖，主减速器从动齿轮，左右各一个半轴齿轮等。

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It transforms the double-differential carrier observation equation using null space transformation so that it need not to resolve real-time three-dimensional position parameters.

对单个历元的双差载波相位观测方程进行零空间变换，避免了实时变化的三维位置参数求解；

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With the help of carrier phase triple differential observation, the theory of detecting and recovering cycle slips is researched and an algorithm is developed.

深入研究了周跳检测与修复的原理，并且基于载波相位三差方程进行周跳检测与修复算法的研究。

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Among the problems discovered by inspectors were "four undercarriage frame cracks including at the drive axle, at the cross member for the motor mounts, and at the differential and over the right front steering axle, " according to a letter sent by Berwick to Federal Motor Carrier Safety Administration Administrator Anne Ferro.

WSJ: Mass. official: Buses pulled from road for safety