3-D frictional contact problem
contact problem in engineering
two-dimensional frictional contact problem
linear programming problem LP problem
servomechanism-type problem servo problem
electrostatic hertz wave
(pressure)gauge with electric contact
3D contact finite element method
3-D contact model
三维接触模型
受艾滋病影响儿童
受艾滋病影响儿童(OVC)