| 摘要 |
A composite structure having a fiber reinforced resinous structure, a core within a hollow portion of the fiber reinforced resinous structure, a tendon under stress and disposed in the core, the tendon exerting stress on the core, and a driving tip attached to the fiber reinforced resinous structure is disclosed. A composite structure having a fiber reinforced resinous structure and a core within a hollow portion of the fiber reinforced resinous structure wherein the fiber reinforced resinous structure is configured to emulate the appearance of a palm tree is also disclosed.
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