| 摘要 |
Parallelly spaced apart shift rods are interlocked by balls between adjacent shift rods. Plungers are mounted on respective shift rods and received in bores communicating with a source of fluid under pressure through a valve which, when closed, blocks movements of the rods. The valve is opened when the driver sits on his seat and wears his safety seat belt, to unlock movements of the plungers in their bores as well as movements of the rods.
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