The results showed that weight and put a cloth off the mouth while working as a result, different quantities of the substance benzene in urine of employees significantly different statistical.
The results showed that the weight and wear a mask while working for a different result in the concentration of benzene in the urine of staff significantly different statistically.
The results showed that the weight and put the mask while working at different result in the amount of benzene in urine of workers were significantly different.