双重作业 meaning in English

double freight operations

The effect of color - coding mode on dual - task performance
双重作业的颜色编码方式对作业绩效的影响
The effects of structure limitation and task difficulty on dual - task performance
结构限制和作业难度对双重作业绩效的影响
Research on the effects of structure limitation and information interference on dual - task performance
结构限制和信息干扰对双重作业绩效的影响