Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
spring =
1.
–k
2.
‰€
3.
t
4.
S
ƒŒƒxƒ‹2.
•ÏX
SDAL“‡‰pŒêŠwZ