virtual rigid spring method
virtual volumetric spring
Virtual Virtual Yoshida Buckling
Spring Force of Constant Torque Spring and Wing-up Spring
virtual robbery of virtual property
contact spring pile-up (contact spring assembly)
half-elliptic spring(semi-elliptic spring)
hard spring， hardening spring
plate spring (plate-form-spring)
plate-form spring (plate spring)
Shape and Spring Back of Constant Torque Spring
soft spring ，softening spring
soft spring， softening spring
spring wheat spring corn intercropping system
’virtual double-line’ method
2D virtual environment simulation