1)radial deviation,径向偏差2)difference of two vector,向径偏差3)radial pointing error angle,径向偏角方差4)circular probable error,径向概率偏差5)radial tolerance,径向容许偏差6)runout,偏差，偏心率，径向跳动
用法和例句
The laser beam divergence versus radial pointing error angle is optimized in the case of a given bit error rate(BER) and a given transmitting optical power.