Carry on the back better applicable people: : (1.2 m to 1.9 m) teenagers, long-term volt caseworker, office crowd, drivers, literary and art workers etc.
背背佳适用人群：(身高1.2米至1.9米)青少年、长期伏案工作者、办公室人群、司机、文艺工作者等。
2
In this case, this worker may not need to do a formal impact analysis.
在这种情况下，该工作人员可能不需要做正式的影响分析。
3
Figure 12 represents the business worker with his corresponding system use case.