1. It is one of the most ideal traps in boiler system steam tracing and midget heating system. 在供热系统中的蒸汽主管线和小型加热设备是最理想的疏水阀之一。
2. Strip tracing is the base of automatization of rolling progress and also the key function of computer control system. 带材跟踪是实现轧制过程自动化的基础，也是轧机计算机控制系统的重要功能之一。
3. A method of storing records in which each record belongs to a list or group of records and has a linking field for tracing the chain. 多个记录的一种储存方法。其中每个记录都从属于某一记录表或某一组记录，并且有跟踪该记录链的链接字段。
英英解释
n.
1. the act of drawing a plan or diagram or outline
2. a drawing created by superimposing a semitransparent sheet of paper on the original image and copyin
