jaw (teeth) positive-contact coupling
square-jaw positive-contact clutch
contact spring pile-up (contact spring assembly)
Ground-Contact Section and Contact Pressure
Test Constructure of contact window or contact resistor of metal-Semiconductor
thermal contact (=thermo-contact)
(pressure)gauge with electric contact
3D contact finite element method
3-D contact model
受艾滋病影响儿童
受艾滋病影响儿童(OVC)
三维接触模型