["粒度別の煤炭の命名問題",,
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"粒度別の煤炭はどのように科学的に命名するか？たとえばブロック煤炭、クリケム煤炭、フメム煤炭、パウダー煤炭はどのように適切に定分するか？",\"
一般的には寸法で命名しています！"
\["この規格は具体的でないと思われ、粒度の大小で、たとえば私たちがよく呼ぶ3-8塊は38cmのサイズです\\"
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