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Contact parameter estimation for DEM simulation of iron ore pellet handling.[J].Gabriel K.P. Barrios;Rodrigo M. de Carvalho;Arno Kwade;Luís Marcelo Tavares.Powder Technology.2013,
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全膜覆盖双垄沟播玉米精量穴直播机[P]. 赵武云;马海军;吴建民;赵新平;马明义;史增录;马国军;牛海华.中国专利:CN202095270U,2012-01-04