工学 〔快递服务〕 释 express mail service；EMS 邮政特快专递 邮政企业采取最快发运速度、专门处理手段及专人直接投递的邮件传递方式。
计算机应用 基于网络的信息服务 释文 emergency medical service, EMS 紧急救援系统
- step pulse
- step resistance
- step response
- step response method
- step response of excitation control system
- step rocket
- step search method
- step sequence
- step servo system
- step size
- step size in search
- step size; step width
- step stress test
- step type optical fiber
- step-type optical fiber
- step-up operator
- step-up substation
- step-up substation control system
- step-up transformer
- step utilization
- step voltage
- step water price
- step width
- stepwise
- stepwise addition polymerization