overhead operation meaning in English
辅助操作
开销操作
内务操作，整理操作，管理作业
Examples
- The oxygen in high - pressure and small - volume cylinder and soluble acetylene in small - volume cylinder are easy for carrying ; they are mainly used in overhead operation , small working space and the work of little quantity
小容积高压氧气钢瓶和小容积溶解乙炔气钢瓶气体，其便于携带、主要在高空作业、狭窄埸所和工程工作量少的地方使用。