Measure pH of the seawater by a pH meter. Measure salinity by a refractometer.
用酸碱度计量度水样本的酸碱值. 用氯化钠折光仪量度样本的氯化钠含量.
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介绍了电脑验光仪单片机控制系统的组成原理和控制原理.
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The gemological refractometer is characterized by small volume and less weight.
这种宝石折射仪的特点是小巧轻便.
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Actual humidity measurements in the boundary layers have been made with a microwave refractometer.
实际上已经用微波折射仪测定了边界层中的湿度.
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目的:用一滴尿折射率方法测定尿渗透浓度(UOC),评价其在指导新生儿特别是早产儿液体治疗中的价值。
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