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Advances in Civil Engineering
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2021
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Article
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Tab 2
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Research Article
Real-Time Warning Model of Highway Engineering Construction Safety Based on Internet of Things
Table 2
How often people are exposed to hazardous environments (E).
Point value
E
10
Continuous exposure
6
Daily working hours exposed
3
Once a week
2
Once a month
1
Several times a year
0.5
Very rare