The study showed that the property of grain triboelectrification relates to grain moisture, friction velocity, dielectric constant and friction material.
The main factor of spring back density is prepressing pressure, next are compression time and compression number of times.The effect of moisture content was not significant.
Minish the well space and increase transflux routeways upper backwater and driving, especially setup precipitation well and drain residual water at the bottom of diving layer.
This paper discussed water liquor acts on micrinite in the calcareous clay at the bottom of saline aquifer and put forward the concept of filter bed of salinity.
All of the genetic factors, maternal environment, storage conditions, collecting methods and the degree of maturity, moisture content, size, shape and colour of seeds can affect hardseed percentage.
The sound wave come from the earth's surface echoed from the interface of the common terrane and the oilness terrane, or the inteface of aquiferous terrane and the gassness terrane.