亚洲一区欧美在线,日韩欧美视频免费观看,色戒的三场床戏分别是在几段,欧美日韩国产在线人成

The intrinsic geometrical quantity of macroscopic soil-engaging surface of bulldozing plate plays a decisive role for its geometrical and dynamic characteristics. Three forms of macroscopic soil-engaging surfaces with the arc, parabola and bionic curve were designed and manufactured. The working resistance was measured with a laboratory soil bin. The intrinsic geometrical quantities of the macroscopic soil-engaging, including the first base quantity (E, F, G) and the second base quantity (L, M, N), were calculated based on the parametric equations of the three macroscopic soil-engaging surfaces. It was discovered that E value in the first class of the base quantity and the value of L in the second class of the base quantity were important factors influencing the working resistances of soil-engaging surfaces. The value of E and L of the bionic soil-engaging surface possessed more complex trend, also obtained lower working resistance accordingly. However, the relatively simple arc bulldozing plate had a relatively large working resistance.