GB 2007.7-87
General rules for sampling and sample preparation of bulk mineral products — Method for determination of particle size by manual sieving
散装矿产品取样、制样通则 粒度测定方法— 手工筛分法
📚 References & Relations / 引用与关联
normative_reference
GB 2007.1
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GB 2007.2
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GB 2007.5
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GB 6003
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GB 6004