低品位油气资源高效开发技术 technology in connection with highly efficient exploitation of low-grade petroleum and gas resources
最低品位 cutoff grade
低品位钨矿 low grade wolfram
低品位矿 low grade ore ; low-grade ores
低品位矿石 low-grade ore ; low grade mineral ; low grade ore ; low grade ores
低品位能源 Low Grade Energy
低品位煤 low grade coal
低品位铜矿 low-grade copper ores
低品位废热 Cool-Energy
然而其中1 000多吨是低品位难选冶金矿。
However, more than 1,000 tons are low-grade and hard to smelt.
本文比较了在建筑控制系统热消耗使用常规热源和那些使用低品位热源。
This article compares control systems of heat consumption in buildings using conventional heat sources and those using low grade heat sources.
原因自然保护的关注在系统使用低品位热源的工作(热能的土壤、空气、放电和排水)。
For the reasons of nature conservation great attention is paid at the systems that use low-grade heat sources in their work (that is heat energy of soils, air, discharge and drain).
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