“腐殖煤”造句
2024年06月30日 23:28:02
在煤巖的分類中,有
腐殖煤和腐泥煤之分.
Coal rock can be classified as humic and sapropelic coal.
黃縣煤田第三紀(jì)
腐殖煤 、 藻燭煤、油頁巖顯微組分富含樹脂體.
Resinite is a rich n 1 aceral in Teriary humic coal, boghead - cannel coal and oil shale fromHuangxian Coalfield.