00645365-n
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| 工作研究, 劳动 研究, 工作效率研究, 工作 效率 研究, 劳动研究, 工作 研究 |
| time and motion study, time-and-motion study, time-motion study, motion study, time study, work study |
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an analysis of a specific job in an effort to find the most efficient method in terms of time and effort |