Describes the design principle and the application of the drop recorder for the transfusion amount, which can display the number of drops on LCD in the treatment process for patients in hospital.

介绍了在医院为病人输液治疗过程中，对输液液滴数进行计数并显示的输液液滴计数器的设计原理和应用。

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Speaking about the January 7 fire in Boston, Hersman said the plane's flight data recorder showed the battery underwent an unexplained drop in voltage from 32 volts to 28 immediately before the incident, as the plane was being serviced on the tarmac.

CNN: Boeing can conduct Dreamliner test flights

Analysis of a flight recorder from that plane showed that a lithium-ion battery experienced a sudden drop in voltage and was not overcharged, the Japan Transport Safety Board said Wednesday.

CNN: What's wrong with the Dreamliner?