the invention of concrete mix plant

Mixing station nominally skills , in May 2010 , they have always mixing station nearly six months to the construction side of the Palazzo Vecchio Triangle affordable housing delivery concrete , concrete block efficacy detect how many groups do not pass the JIANXIN self loading concrete mixer relating to this end cover half of the floor portion of the organized search, concrete strength invention has been used to cover the floors of non-compliance . He and Wang Guodong Daxing Palazzo Vecchio triangle to the construction site , with a measuring instrument to detect it, the invention of concrete strength cement concrete mixer the 50% or 60% of the scale . Why do you make a low concrete strength so much  How the ratio , in order to control costs, the ratio of raw materials secretly changed , to put some more homemade ingredients , put some less expensive .