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简介 Description

 仪表特点 Description

               

Calibration solution pH4 40ml 校准液

                                                                                             

              

Calibration solution pH7 40ml 校准液

 

             

Calibration solution pH9 40ml 校准液

 

              

pH-Calibration set(1xpH7,1x pH9, each 40ml)