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Electronic truck scales are widely used in factories, metallurgy, foreign trade, manufacturing, oil and chemical, mining, warehousing and railway departments for weighing bulk goods for car freight. It is a non-automatic scale with an accuracy class III (medium accuracy class) for trade settlement, equivalent to the International Organization of Legal Metrology (OIML) International Recommendation R76-1. Electronic vehicle scale is China's legal compulsory management of measuring equipment, only according to the law to obtain a valid production license, repair and installation license to carry out the manufacture, repair and installation of electronic vehicle scale.