abbr. [数]均方根（值）（Root-Mean-Square）；铁路邮政（Railway Mail Service）；皇家邮政（Royal Mail Service）；记录管理服务（Record Management Services）
参考例句
1. It is proved by computer simulation that the rms error of this new arithmetic is just almost 1/5 of that using the mean arithmetic. 通过计算机模拟计算，表明新算法的微波相位差测量结果的均方根误差，近似只有平均算法的1/5。
2. Multiple scattering from two-dimensional rough surface with large surface root mean square(RMS) slope is studied with Kirchhoff approximation. 利用基尔霍夫近似研究了表面均方根斜率较大的二维粗糙面的多次散射问题。
3. For a transformer type ballast, the voltage value to be applied from this table is the rms voltage rating of the capacitor as specified on the ballast. 对于一个变压器型的（传统）镇流器，本表中所列出的电压值是镇流器上标注的电容器的额定电压有效值。
