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CONSTANT health scale uses GB15763.2-2005 international in the construction safety glass temperature 200 degrees Celsius, hardness and impact resistance, use safety. Using HPM (Evanohms), the production of Yi Wen (0.1um) foil material, the error control in the import foil material advantage is very obvious, the error control is good, the stability is good. CONSTANT according to the characteristics of the output of the sensor, divided into three sections to amend, better guarantee the accuracy and accuracy of the measurement of the weight scale.