It's interesting because the building demolition work, there is a threat to health, such as. Silica dust, which is what these threats result in health hazards the worker is harmful to the respiratory system. If exposed to this task long journey may make silicone disease (1949). Lung cancer and from the security organization of Iran nationals. It found that in the construction industry, with the rate of accidents and health hazards of high. So I choose to offer this seminar topics, get to know the people involved.
การแปล กรุณารอสักครู่..
![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)