1) classification of low-grade coals
低品位煤分等
2) personal rank classification
品位分等
3) catalytic ignition of coal
煤品位
4) high grade coal
高品位煤
5) low ash coal
低灰分煤
6) middle-low grade
中低品位
1.
Analysis and proposal about rational utilization of middle-low grade phosphate rock in Hubei province;
湖北省中低品位磷矿合理利用的分析与建议
2.
Optical microscope,X-ray diffraction,infra-red spectrum,scaning electron microscope and energy dispersive spectrometer were used to research the process properties of middle-low grade silicate-calcareous phosphate rocks in Yunnan.
中低品位磷块岩的开发是我国磷资源产业可持续发展的保障,工艺矿物学研究则是矿产资源合理利用的基础。
补充资料：低品
1.犹言下等。
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参考词条