It was developed a braking system for electric trains equipped with cast iron braking shoes. which allows shortening braking distance at emergency braking. Braking efficiency Increase is provided at the expense of braking force regulation depending on train speed according to calculated force of wheels with rails cohesion change. Analytical dependencies set as the basic of suggested b... https://bookmarksaifi.com/story19588366/occurrence-of-geohelminths-in-the-soil-of-public-squares-in-rio-branco-acre-state-brazilian-western-amazon