在资料整理过程中，28份因填写不完整和故意作答作为无效问卷被剔除，最后回收资料填写完整的问卷292份，有效率91.3%。
In the process of data collection, 28 surveys were eliminated because some participant response was not complete or true, so 292 complete surveys were obtained with an efficient rate of 91.3%.
全面了解废旧电子产品回收行业作业场所的卫生状况，为进一步研究该行业的职业危害状况提供资料。
To overall explore the hygiene status of workplace in waste electronic products recycle industry and to provide datum of further researching that the Occupational hazards status.
在整理和分析示踪沙扫测资料时，通过计算回收率来评价是否能算出计数率等值线的重心，以便进行输沙率或回淤量的定量计算。
The recovery of tracer shows whether the field tracer data can be used to calculate the transport sediment rate or the infill rate of sediment.
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