奥豪斯 实验室pH计 AB33PH Bench Meter AB33PH-F由奥豪斯国际贸易（上海）有限公司提供，产地为江苏，属于国产台式pH计，符合多项 ...

梅特勒托利多梅特勒-托利多FE38-Meter电导率仪pH/离子计、电导率仪由北京德泉兴业商贸有限公司提供，产地为德国，属于进口 ...

pH is an important parameter to control the production of food, medicine, petrochemical products and others. Thus, standard reference materials used to calibrate pH meters are necessary to guarantee ...

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