基本解释硬煤,劣质煤英汉例句双语例句The percussive speed of the material is adjustable to obtain different impact so as to separate bastard coal with different hardness.物料的撞击速度可以调整,以获得不同的冲击力,对不同硬度的煤矸进行分 离。ip.combastard coal更多例句词组短语短语bastard d coal 硬煤bastard coal更多词组专业释义能源科学技术硬煤