ASTM D2797_D2797M-20 Standard Practice for Preparing Coal Samples for Microscopical Analysis by Re
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- 标准类型：国外其他
- 标准语言：英文版
- 文件类型：PDF文档
- 更新时间：2022-05-24
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ASTM D2797_D2797M-20 Standard Practice for Preparing Coal Samples for Microscopical Analysis by Re