inferior coal_矿业英汉词典
inferior coal
[矿业英汉词典]
inferior coal劣质煤
是什么意思，inferior coal的解释，inferior coal的翻译
[机械英汉词典] inferior coal
[环境英汉词典] inferior coal
[电力英汉词典] inferior coal
[电子工程英汉词典] inferior coal
[能源英汉词典] inferior coal
劣质煤
