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Compared to non-manual employees, there was a higher percentage of manual employees with a length of time working in construction industry of more than 20 years (17.6% vs 67.9%, 2 = 10.7, p = 0.001), working in a dusty environment and smoking (5.9% vs 50.0%, 2 = 9.3, p = 0.002), and with breathing problems (0% vs 53.6%, 2 = 13.7, p 1000 employees (Table 3)

Smoking causes lung diseases because tobacco smoke contains thousands of harmful chemicals that irritate and inflame the airways

Sometimes, though, it's just a matter of an unbalanced blend

Not only that, but our vending machines are also equipped with intelligent functions, equipped with touch screen interfaces, and payment systems, which are easy and convenient to operate