It describes the designing, logic circuit, working principle and adjustment of the pneumatic rubber plate logic control system attached to the horizontal multiple-hollow-chisel mortiser.
详细阐明卧式多头打眼

膜片
辑
制系统的
,
辑线路,工作原理及其调试。
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Improvements made after Leoneck's death in 1826 included a flexible tube, two earpieces and a dual head version to press against the back and chest, a hollow bell to detect low frequency sounds and a diaphragm to pick up high frequency sounds.
1826年Leoneck去世后,听诊器的改进包括了柔性管、两个

及一种双
版本,用于

部和胸部;还有空心钟型部分用于探测低频声音,
及一个膜片用于捕捉高频声音。