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我们在塑料电筒中增设一晶体管放大线路,试制成一种可用于水位报警,钻孔抽水试验及地下水长期观测中测量水位的半导体水位计。仪器的线路图
We added a transistor amplification circuit to the plastic flashlight and tried to make a semiconductor water level gauge that can be used for water level alarming, drilling pumping test and long-term observation of groundwater. The circuit diagram of the instrument