商品煤 meaning in Chinese

commercially disposable coal
merchantable coal
salable coal

Judging method for reflectogram of commercial coal
商品煤反射率分布图的判别方法
Method for quality sport check and acceptance of commercial coal
商品煤质量抽查和验收方法
Sampling for commercial coal
商品煤样采取方法
Reason analysis of deviation in sampling and preparation of commercial coal
浅谈商品煤采制样过程中经常出现差异的原因
The research and application of measurement manage system about commercial coal belt weigher
商品煤皮带秤计量管理系统的研究与应用