tracing machine meaning in English

电子轨迹描绘器，描图机
绘图机
描图机

Circuit tracing machine
电路绘图机
The communication model is a twp - tier architecture , the main function of superstratum ( name server ) is tracing the domain which target agent belong to presently . the main function of substrate ( domain - inside tracing machine ) is the message transfer and denominating the new created agent
本文所提的通信模型分为了两层结构，上层的名字服务器主要提供按名字追踪目标agent所属域的功能，下层的域内追踪器完成消息转发及为新生agent命名的功能。