“secondary shaft”的概念、定义、翻译、参考文献-科学参考

单词	secondary shaft
释义	secondary shaft [`sek·ǝn´der·ē `shaft] ^{MINING ENGINEERING} The shaft which extends a mine downward from the bottom of, but not in line with, the primary shaft.
随便看	Restionales air entrainment air environment air equivalent air escape air-exhaust ventilator air feed airfield air filter airfloat clay air flotation airflow airflow duct airflow orifice airflow pipe airflow stack effect airfoil airfoil profile airfoil section airfoil shape airfoil-vane fan airframe air-fuel mixture air-fuel ratio air furnace

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。