In addition, flour mills, cement factories and other work environments tend to be bad, contaminated by dust, which is not conducive to the health of staff.
In addition, flour mills, cement factories and other work environments tend to be more severe, severely affected by the dust pollution, which is not conducive to good health staff.
In addition, flour mills, cement factories and other working environment is generally relatively poor, serious dust pollution, which is not conducive to the health of the staff.