| 摘要 |
A spring section (130) comprises a first flat section (L1), a first bent section (M1), a second flat section (L2), a second bent section (M2), a third flat section (L3), a third bent section (M3), a fourth flat section (L4), a fourth bent section (M4), an arc section (E), and an elbow section (K). The first bent section (M1), the second flat section (L2), the second bent section (M2), the third flat section (L3), the third bent section (M3), the fourth flat section (L4), the fourth bent section (M4), the arc section (E), and the elbow section (K) constitute an arc-shaped section. |
