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석탄의 분류 총표에서 숫자는 무엇을 의미하는가

2016-12-29View Original

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석탄의 분류 총표에서, 숫자 항목은 무엇을 의미하나요? 분류 기호 숫자 VrPM 무연탄 WY01, 02, 03 ≤10.0— 연탄 YM11, 12, 13, 14, 15, 16 21, 22, 23, 24, 25, 26 31, 32, 33, 34, 35, 36 41, 42, 43, 44, 45, 46 >10.0— 갈탄 HM51, 53 >37.0 ≤50 숫자에 따라 정의됨?왜 04가 없나요?
Reply #22017-01-04
포럼이 너무 썰렁하네요. 글을 올려도 아무도 보지 않고, 답장도 없고, 댓글도 없어요. 나쁜 글들을 삭제해도 아무도 신경 쓰지 않네요. 실망스럽고, 이 포럼에 대한 신뢰를 잃었습니다.

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