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