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Zhai Xue-Qi, Wang Jin-Feng, Feng Li-Jie and Gao Xiao-Ning, 2013. Calculation Model of Safety Level of Production Logistics System in Coal Mine. Journal of Applied Sciences, 13: 5225-5229.
DOI: 10.3923/jas.2013.5225.5229
URL: https://scialert.net/abstract/?doi=jas.2013.5225.5229
DOI: 10.3923/jas.2013.5225.5229
URL: https://scialert.net/abstract/?doi=jas.2013.5225.5229