... 高质理想 higher prime ideal 美国高质 GOULDS 高质煤 high-rank coals ; rank coals ...
基于84个网页-相关网页
·2,447,543篇论文数据，部分数据来源于NoteExpress
Coal maceral concentrates of high purity were prepared from four different rank coals by Density Gradient Centrifugation method.
经等密度梯度离心分离，从褐煤、长焰煤、气煤和贫煤四种不同变质程度煤中获得了高纯度的有机显微组分。
youdao
应用推荐
模块上移
模块下移
不移动