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Nov 16, 2018 & 0183;& 32;Figure 2 showed that the numbers of miners in China and the USA are far higher than those in Australia. In 2016, there were 43,700 coal miners in Australia and 50,680 in the USA 30,31,32,33 .In China, there is lack of distinction between the various sectors of the mining industry, such as coal mining and metalliferous mining.

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Mar 05, 2020 & 0183;& 32;Respirator Rating Systems. The biggest factor that makes understanding respirator ratings so difficult is the number of different systems. The most commonly known respirator rating is the NIOSH system, which rates masks as N95, N99, and N100. These masks are rated by the American National Institute for Occupational Safety and health, which is part of the CDC.

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China has high and increasing annual rates of occupational lung diseases such as pneumoconiosis and silicosis. In contrast, Australia and the United States of America USA have greatly lowered their annual rates of lung diseases since the 1970s. This paper systematically compared and analysed the multi elements of coal dust management and health management in these three countries to provide

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New pneumonia is a kind of respiratory disease. Wearing masks is an effective way to prevent coronavirus pneumonia. So, it is necessary for us to know some face mask certification standards in different regions. 1. China's requirements for face mask Civil face mask standard GBT 32610 2016 and labor protection face mask standard gb2626 2006. a.

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respiratory KP100 face mask in Australia