The JJD 1021-1994 standard is the "Relative Density Meter verification procedure", which applies to the determination of the maximum and minimum dry Density of sand, and then the calculation of the relative Density. The procedure details the method of verification, technical requirements and operating procedures of the relative Density meter to ensure the accuracy and reliability of the instrument measurement. Density measurement is essential in the fields of geological exploration and materials science.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
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