Currently there have been formed industrial uranium deposits in Kyzylkum province that refer to three types of formations—exogenetic uranium formation in the s
摘 要:介绍一款用于液体小流量测量的自制流量计,给出了流量计的结构,推导出流量与电压的关系。所设计的流量计结构简单,操作方便,精确度高。 关键词:流量计;微型直流电机;叶轮 The flowmeter made to measure low flow He Liuliang Beijing university of civil engineering and architecture