Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
spring =
1. ’¹
2.
3. –k
4. t

ƒŒƒxƒ‹2. •ÏX
SDAL“‡‰pŒêŠwZ