FM反正切解调
arc tangent FM demodulation
城市的正面背面
Front and rear view of the city
赤道圆筒正切投影图
equatorial cylindrical orthomophic chart
淡黄黄牛正面劳动手套革
light yellow cow leather for working gloves
电容量和损耗角正切
the rate capacitance and tangent of the loss angle
断面正压力
fault-section normal pressure
positive stress on fault plane