| 摘要 |
A braking device ( 10, 50, 203 ) for a board includes a brake base ( 16,52 ) and a braking arm ( 56 ) which is mountable to the base and movable relative thereto between a retracted position and a braking position. The device further includes a biasing spring ( 72 ) to bias the braking arm into its braking position, and a locking mechanism ( 13,90,206 ) operative to releasably lock the braking arm in its retracted position.
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