血液循环

This device draws a tracing on a strip of paper to give an accurate representation of the changes in electrical activity occurring in the heart, and can also give evidence of any previous heart disease that may have been the cause of the condition.

这个装置提请追查就带文件给一个准确的代表性的变化，在电活动发生在心脏，也可以提供证据以往任何心脏疾病可能已事业的条件。

What this paper works over is comunication system among each HEV's Ecus.

本文课题研究的正是混合动力客车的电子设备之间的通信系统。