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Although the safety document of Chinese coal mines has improved drastically before decade, in 2009 the government documented that 2631 deaths happened in mines. The most important motive is always that safety actions are sometimes neglected as a result of superior demand from customers for coal and a lack of https://bookmarktiger.com/story12534322/what-does-%E4%BB%A3%E5%AF%AB%E8%AB%96%E6%96%87-mean


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