overall resistance of mine airflow
overall resistance of mine airflow
[冶金学英汉词典]
overall resistance of mine airflow矿井通风总阻力
是什么意思，overall resistance of mine airflow的解释，overall resistance of mine airflow的翻译
overall resistance of mine airflow
[冶金学英汉词典]
overall resistance of mine airflow是什么意思，overall resistance of mine airflow的解释，overall resistance of mine airflow的翻译