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shui wen di zhi guan ce liang yong yin xiang qi
Pages: 60-61
Year: Issue:  4
Journal: Hydrogeology and Engineering Geology

Keyword:  音响器晶体管观测流速仪测流实际工作水文地质钻孔水位效果良好两用电路;
Abstract: <正> “晶体管音响器”常用作测定水位。当用流速仪测流时,也常用“晶体管音响器”计算转数。在实际工作中,我们对“晶体管音响器”稍加改动,使之既能作钻孔水位观测之用,又可用于流速仪作音响计数,做到了一物两用,效果良好。改进后的电路如图1。
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