All soil samples taken technical study geotechnical engineering properties to examine the quality of the soil, construction of rail vehicles: the test of the value soil grain size mix .
All soil samples taken geotechnical engineering study to determine the quality of the soil to the construction of rail cars, including determination of the mass of the soil.
All soil samples studied in geotechnical engineering properties to verify the quality of the soil to use construction railway embankment; Determination of the particle size of soil .