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