Spring Force of Constant Torque Spring and Wing-up Spring

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

bicycle freewheel

clutch freewheel switch

Freewheel

freewheel cage

freewheel cam

Freewheel Clutch

freewheel current

freewheel during the commutation

freewheel low pressure relief valve