The method of calculating the reflection point positions and path clearance of the electric wave at the level ground and mountainous region for the microwave relay communication is described.

本文叙述在微波中继通信中，确定和计算电波在平坦地面和起伏山地的反射点位置及路径余隙的方法。

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An analysis of the effect of tooth path and optimum clearance Angle on tool life in the up milling and down milling processes is presented.

本文分析了铣削轨迹及合理后角对顺铣与逆铣中刀齿耐用度的影响。

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The control on the deepsea tractor focuses on its velocity, orientation-path clearance and collecting performance.

集矿作业车控制主要为对作业车行走速度、行走方向、行走轨迹和工作机构状态的控制；

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Longtime Chelsea target Willian leveled in the ninth minute but fellow Brazilian midfielder Oscar gave the home team the halftime advantage with a superb long-range volley after Pyatov - racing out of his area -- headed a clearance straight into his path.

CNN: Barca's unbeaten run ended by Celtic