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yi zhong di xia shui wei guan ce tan tou de gou si
Author(s): 
Pages: 223
Year: Issue:  4
Journal: Underground Water

Keyword:  万用表地下水观测探头体斜接触深井观测观测水位测绳水位计水面水位观测;
Abstract: <正> 目前,地下水观测多延用较为落后的测绳带测钟和一线一地万用表。这两种比较经济,但是无论那种观测水位工具,大都忽视了接触水位一头所造成的误差,就测绳带测钟来说,测钟进入水面多少?再者,测绳硬度较大,观测时往往弯曲;弯曲多少,都很难估计。一线一地万用表在深井观测时,接触水面一头往往接触到潮湿的井壁,线路也可导电,给观测者造成误会。如何使接触水面一
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