[hacker news] An open-source stethoscope that costs between $2.5 and $5 to produce]

摘要

An open-source stethoscope that costs between $2.5 and $5 to produce]

来源

本文首发于 hacker news。

阅读原文：[An open-source stethoscope that costs between $2.5 and $5 to produce]](https://github.com/GliaX/Stethoscope)